Earthquakes in the United States, January-March 1978

CECIL D. ANDRUS, Secretary

H. William Menard, Director

Free on application to Branch of Distribution, U. S. Geological Survey, 1200 South Eads Street 1 Arlington 1 VA 22202

By C. W. Stover, J. H. Minsch, and B. G. Reagor

u.s. the u.s.

A2 A3 A4

by u.s.

AS

a-. FIGURE 5.--Earthquake epicenters in Alaska for January-March 1978, plotted from table 1.

b

A8 A9

JAN.

JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. 21 JAN. JAN. 22 JAN. JAN. JAN. JAN. JAN. 26 JAN. JAN. JAN. JAN. 28 JAN. FEB. FEB. FEB. FEB. FEB. FEB. FEB. 12 FEB. 13 Table I.--Summary of u.s. earthquakes for January-March 1978

[Sources of the hypocenters and magnitudes:

University Berkeley; (D) University of Montana, Missoula; (E) u.s. Department of Energy, Las Vegas, Nevada; Earthquake Information Service; (H) u.s. Geological Survey, Hawaiian Volcano Lamont-Doherty Geological Observatory, Palisades, N.Y.; Oceanic and Atmospheric Administration, Alaska Tsunami Warning Center, Palmer; (P) California Institute of Technology, Pasadena; University, St. Louis, Missouri; (T) University of Oklahoma, Leonard; (U) University of Utah, Salt Lake City; Institute and State University, Blacksburg; Washington, Seattle. N, Normal depth; UTC, Universal Coordinated Time. For names of local time zones, see figures 2 and 3. indicate no information available]

04 23 11.0 20 57 38.2 20 07 43.4 19 56 09.8 21 00 13.2 07 08 43.8 21 59 01.1 20 48 45.0 22 13 57.1 07 06 05.8 22 18 14.6 12 09 16.4 23 33 25.2 20 30 38.7 21 08 58.7 18 49 45.0 04 51 51.1 17 04 18.1 16 24 48.2 22 49 37.7 02 02 54 .o 08 09 28.4 13 46 54.2 09 20 21.4 11 32 06.6 21 43 03.6 03 10 55.8 18 52 59.2 02 19 39.4 02 25 01.6 18 53 06.8 12 58 48.8 21 49 02.1 OS 00 34.7 12 40 26.1 07 00 50.0 13 18 43.3 12 10 27.6 08 56 38.9 01 16 54.3 of Alaska, Fairbanks;

Observatory;

32.76 N. 34.42 N.

60.81 N. 51.10 N. 178.15 w. 64.43 N. 61.33 N. 56.02 N. 154.27 w. 51.78 N. 176.01 w. 60.91 N. 61.91 N. 57.11 N. 62.00 N. 148.82 w. 51.61 N. 177.17 w. 64.74 N. 147.44 w. 60.54 N. 54.17 N. 164.09 w. 59.16 N. 144.39 w. 63.26 N. 52.18 N. 170.35 w. 52.92 N.

63. 15 N. 149.92 w.

66.24 N. 157.40 w. 60.24 N. 152.33 w. 51.30 N. 61.65 N. 150.63 w. 69.30 N. 60.64 N. 14 7. 2 7 w. 52.13 N. 54.56 N. 155.73 w. 60.37 N. 151.12 w. 63.25 N. 150.68 w. 63.06 N. 150.96 w. 60.07 N. 62.90 N. 150.48 w. 62.01 N. 149.06 w. 62.26 N. 150.96 w. 58.18 N. 154.92 w. 59.79 N. 62.16 N. 148.71 w. 53.07 N. 171.03 E. 59.45 N. 152.62 w. 59.86 N. 153.76 w.

(J) Weston Observatory, Massachusetts;

88.24 w.

86.61 w.

151.72 w. 146. 56 w. 151.65 w.

149.38 w. 150.67 w. 153.41 w.

151.83W.

150.90 w. 166.43 w.

177.90 E. 142.83 w.

169.81 w.

151.33 w.

152.90 w. (B) University of California,

(G) u.s. Geological Survey, National

------------------· intensity source -------------------

ALASKA 4.0 33N 5.1 4.4 33N 4.9 5.3 4.6 4.8

4.8 33N 4.7 33N 33N 4.6

33N 5.0 33N 4. 7 4.7 4.4 4.5 3.4

33N 33N 5.2 5.4 4.9

AlO

4.7 (W)

4. 9M
5. 8M
6. 7M
7. OM
8. 7M

G G G III G G IV G v G JAN.

G G III G II G III A G G G G G IV G G G III G G G G G G G III G G G III G G G G G G G G v G FEB. P.M. AST G (L)

JAN. FEB. 28 10 P.M. CST

JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. 10 02 A.M. AST JAN. 13 01 P.M. AST JAN.

14 09 A.M. BST JAN. 15 11 A.M. AST JAN. 17 08 A.M. AST JAN. 17 05 P.M. BST JAN. 18 06 A.M. BST JAN. 19 06 A.M. AST JAN. 21 12 P.M. AST JAN.

21 04 P.M. AST JAN. 21 09 P.M. BST JAN.

23 03 A.M. AST JAN. 24 11 P.M. AST JAN. 25 01 A.M·. AST JAN. 25 10 A.M. BST JAN. 25 05 P.M. AST JAN. 27 08 A.M. AST JAN. 27 04 p.M. AST JAN. 27 04 P.M. AST JAN. 28 08 A.M. AST JAN. 29 02 A.M. AST FEB. FEB. FEB. FEB. FEB.

10 03 A.M. AST FEB.

11 01 A.M. BST FEB.

12 03 P.M. AST 8 05 A.M. CST

1 06 P.M. AST 2 09 A.M. BST 3 10 A.M. AST 5 09 A.M. AST 5 11 A.M. AST 5 08 P.M. BST 6 11 A.M. AST 7 10 A.M. AST 8 12 P.M. AST 8 09 P.M. AST 9 11 A.M. BST

2 11 A.M. AST 3 07 P.M. AST 5 02 A.M. AST 5 09 P.M. AST

FEB. FEB. FEB. FEB. FEB. 19 FEB. FEB. FEB. 21 FEB. FEB. 26

MAR. MAR.

MAR.

MAR. 23 MAR. 24 MAR. 25

JAN. JAN. JAN. JAN. JAN. JAN. JAN. JAN. 14 JAN. JAN. JAN. 15 JAN. JAN. JAN. 21 JAN. 21 Table 1.--Summary of U.S. earthquakes for January-March 1978--Continued

14 52 42.0 18 33 42.3 20 53 49.0 06 28 57.6 14 30 04.3 03 43 1L. 6 03 45 39.4 05 31 26.6 21 55 57.3 10 52 37.8 11 58 47.6 01 48 33.7 10 56 19.3 14 41 40.7 184836.7 07 34 10.7 10 23 01.4 00 33 26.8 18 40 23.6 20 47 25.6 01 53 13.8 02 34 35.0 13 30 06.4 03 15 19.2 02 30 23.6 15 01 51.4 02 00 50.4 02 09 38.4 02 31 10.5 03 29 59.6 16 12 35.3 21 26 38.8 03 37 05.3 03 59 os.o 08 15 37.5 15 45 20.3 07 23 13.4 05 22 09.9 06 20 19.3 09 30 29.5 20 08 12.2 10 28 50.8 00 19 06.2 00 38 13.4

12 23 0.5 10 52 21.2 06 11 42.4 10 42 44.8 08 21 35.8 22 10 31.3 15 45 45.6 16 13 8.9 09 4 7 2.4 10 5 12.7 12 29 0.9 14 38 26.2 20 59 12.9 11 20 40.5 11 26 9.4 59.43 N. 52.38 N. 166.75 w. 61.31 N. 63.36 N. 51.96 N. 178.44 w. 51.32 N. 51.26 N. 177.10E.

62. 78 N. 152.78 w.

51.46 N. 176.17 w. 60.07 N. 152.85 w. 66.09 N. 149.49 w.

61. 19 N. 151.27 w.

53.23 N. 56.39 N. 56.32 N. 152.80 w. 52.93 N. 56.26 N. 152.72 w. 59.96 N. 153.50 w. 155 51.76 N. 59.00 N. 154.27 w. 59.65 N. 152.71 w. 60.79 N. 153.77 w. 59.41 N. 61.48 N. 150.76W. 51.97 N. 179.11 w. 52.26 N. 168.44 w. 52.27 N. 168.59 w. 52.30 N. 168.62 w. 52.43 N. 168.59 w. 52.31 N. 168.58 w. 59.63 N. 153.34 w. 62.55 N. 150.88 w. 63.78 N. 147-50 w. 60.18 N. 153.61 w. 59.84 N. 153.24 w. 64.88 N. 160.48 w. 52.01 N. 169.47 w. 52.22 N. 169.52 w. 57.00 N. 63.28 N. 151.12 w. 67.36 N. 146.07 w. 59.05 N. 60.33 N. 152. 52 w. 128 61.77 N. 151.41 w.

40.65 N. 124.77 w. 36.25 N. 36.18 N. 39.42 N. 36.63 N. 40.10 N. 121.09 w. 38.81 N. 40.32 N. 124.07 w. 35.80 N. 3 7. 52 N. 119.,04 w. 3 7. 48 N. 119.03 w. 39.14 N. 123.25 w. 39.15 N. 40.26 N. 40.25 N. ALASKA--Continued

145.63 w. 144.89 w0 33N 151.17 w.

177.12 E.

171.49 E. 158.28 w.

168.95 w.

175.81 w.

152.08 w.

154.17W.

151.83 w.

117.93 w. 118.38 w. 123.33 w. 121.31 w.

122.79 w. 118.03 w.

123.26 w. 121.28 w. 121.27 w.

------------------ intensity source -------------------

33N 4.0 33N 33N 33N

A 11

s.s 5.3

3. 6M
4. 5M
5. 4M
6. 7B
7. 3P
8. 9B

3.0B 3.4B 3.1B 3.0B 3.4P 3.3B 3.8B 3.0B

2. 9B

2.9B 2.6B IV G

II G III G

... G MAR • 30 02 P.M. AST v G MAR. P.M. AST

IV B ... G JAN. 5 P.M. PST

v B

III B B B B IV B v B JAN. P.M. PST B B FEB. 16 04 A.M. AST FEB. 16 07 A.M. BST FEB. 16 10 A.M. AST FEB. 18 08 P.M. AST FEB. 19 03 A.M. BST FEB. 19 04 P.M. BST FEB.

19 04 P.M. BST FEB. 20 07 P.M. AST FEB. 22 10 A.M. BST FEB. 26 00 A.M. AST MAR. MAR. MAR. MAR.

MAR. MAR. MAR. MAR. MAR. HAR. MAR. 11 03 A.M. AST MAR. 11 OS P.M. AST MAR. 13 03 P.M. BST MAR. 15 04 A.M. BST MAR. 15 03 P.M. BST MAR. 15 03 P.M. BST MAR. 15 03 P.M. BST MAR. 15 04 P.M. BST MAR. 18 06 A.M. AST MAR.

18 11 A.~1. AST MAR. 18 05 P.M. AST MAR. 19 05 P.M. AST MAR. 19 10 P.M. AST 22 OS A.M. AST MAR. 22 08 P.H. BST MAR. 23 06 P.M. BST 24 08 P.M. AST MAR.

25 11 P.H. AST MAR. 26 10 A.M. AST MAR. 28 00 A.M. AST

JAN. JAN. JAN. JAN. 10 00 A.M. PST JAN. 10 02 P.H. PST JAN. 14 07 A.M. PST JAN. 14 08 A.M. PST JAN. 15 01 A.M. PST JAN. 15 02 A.M. PST JAN. 15 04 A.M. PST JAN. 15 06 A.M. PST JAN. 21 03 A.t-t. PST JAN. 21 03 A.M. PST 1 01 A.M. AST 1 03 P.M. AST 1 11 P.M. BST 2 04 A.M. AST 3 08 A.M. AST 3 08 P.M. BST 4 00 A.M. AST 4 02 P.M. AST 6 07 A.M. BST 6 10 A.M. AST 6 03 P.M. AST 9 04 P.M. AST

4 04 A.M. PST 5 02 A.M. PST 6 02 A.M. PST

JAN. 24 JAN. 24 JAN. 25 JAN. JAN. 29 JAN. 29 JAN. 31 FEB. FEB. FEB. FEB. FEB. FEB. FEB. FEB. 11 FEB. 11 FEB. 11 FEB. FEB. 13 FEB. FEB. 14 FEB. 14 FEB. 16 FEB. FEB. 17 FEB FEB. FEB. 23 FEB.

MAR. 21 MAR. 22

MAR. 27 Table 1.--Summary of U.S. earthquakes for January-March 1978--Continued

08 13 21.7 12 26 44.2 10 40 50.0 08 49 02.5 01 55 49.8 02 56 9.0 14 18 10.0 14 8 44.6 09 53 41.5 00 39 25.8 28.9 12 57 14.2 13 39 22.7 20 8 21.2 01 45 30.5 01 45 51.0 02 25 51.4 06 8 46.5 18 4 6.3 16 33 46.9 20 3 9.5 21 3 55.4 10 54 35.3 07 35 26.7 10 13 45.2 23 38 54.3 10 14 6.1 16 43 3.7 16 20 52.1 04 54 31.2 18 37 24 .o 15 28 33.7 14 49 34.9 16 38 15.7 16 9 51.2 23 59 ss.o 04 2 49.4 04 9 39.7 08 20 36.5 00 7 56.7 14 5 12.1 20 17 6.8 06 33 17.3 08 40 35.3 00 27 4.8 00 34 11.9 01 19 10.0 02 29 16.9 04 28 18.6 10 56 22.4 04 27 1.1 04 29 13.9 08 44 3.0 16 15 33.6 01 3 27.7 33.2 7 N. 116.00 w. 34.68 N.

34. 32 N. 118.33 w.

39.40 N. 123.35 1-]. 37.18 N. 34.03 N.

34. 18 N. 118.63 w.

32.97 N. 34.32 N. 34.03 N. 116.78 w. 34.03 N. 33.25 N. 39.41 N. 123.17W. 36.91 N. 33.02 N. 115.53 w. 33.02 N. 33.02 N. 40.23 N. 122.11 w. 34.02 N. 117-22 w. 38.41 N. 122.65 w. 38.42 N. 122.66 w. 40.30 N. 124.27 w. 33.42 N. 40.10 N. 121.43 w.

35. 72 N. 115.92 w.

35.65 N. 121.04 w. 38.29 N. 32.82 N. 40.51 N. 34.53 N. 36.02 N. 36.00 N. 117.63 w. 33.83 N. 11 7. 88 w. 33.93 N. 117.98 w. 33.95 N. 117.97 w. 34.00 N. 118.68 w. 32.78 N. 115.53 w. 32.78 N. 115.57 w. 35.32 N. ll8.52 w. 36.00 N. 117.87W. 40.44 N. 124.45 w. 40.44 N. 124-46 w. 40.12 N. 122.95 w. 40.09 N. 12 2. 95 w. 39.21 N. 123. 17 w. 39.21 N. 39.20 N. 39.21 N. 123.17 w. 39.23 N. 123. 19 w. 36.93 N. 117.46 w. 34.85 N. 37.00 N. 117.83 w. 40.43 N. 124-31 w. 39.19 N. 123.16 w. 38.48 N. 123.34 w.

118.93 w.

117.85 w. ll5.62 w. 115.85 w. 116.72 w.

116.78W. 115.57 w. 121.70 w.

115.53 w. llS. 53 w.

ll6. 40 w.

119.11 w.

us. 60 w.

121.93 w. 116.77W. 117.63 w.

123.14 w. 123.17W.

117.08 w.

------------------ intensity source -------------------

4.1 3.3P 3.0P 2.7P 2.5B

2. 9B
3. 4B

2.1P 3.0P 3.6P 3.1P 3.3P 3.4P

2. 7B

3.0B 2.SP 2.SP 3.1P

3. 3B
4. 8B

2.SB 4.0B 3.0P 3.0B 3.0P 3.1B

3. 2B

3.6P 3.0B 4.4P 3.0P 3.3P 2.9P 3.2P 2.SP 3.2P 2.9P 3.2P 3.SP 3.0P

3. SB

3.4B 3.2B 3.2B 4.4B 3.1B 3.6B 3.3B 3.SB 3.2B 3.1P 3.1B

3. 2B
4. 6B

III p v B JAN. A.M. PST B

III p III p

v p

v B FEB.

III p B II p B B IV B B

B ... B FEB. 23 02 A.M. PST

v p

IV p VI p IV p

III p III p III p IV B B B B VI B IV B IV B IV B IV B B MAR. 26 02 A.M. PST

... B MAR. 26 P.M. PST v G MAR. A.M. PST B B JAN. 24 00 A.M. PST JAN. 24 04 A.M. "PST JAN. 25 02 A.M. PST JAN. 28 05 P.M. PST JAN. 28 06 P.M. PST JAN. 31 06 A.:t-1. PST FEB. FEB. FEB. FEB. FEB. FEB. FEB.

10 OS P.M. PST FEB.

10 OS P.M. PST FEB.

10 06 P.M. PST FEB. 12 10 P.M. PST FEB. 13 10 A.M. PST FEB.

14 08 A.:t-1. PST FEB.

14 12 P.M. PST FEB.

14 01 P.M. PST FEB.

16 02 A.M. PST FEB.

16 11 P.M. PST FEB. 17 02 A.M. PST FEB. 20 03 P.M. PST FEB. 23 08 A.M. PST FEB. 28 08 A.M. PST FEB. 28 08 P.M. PST

MAR.

13 08 A.M. PST 14 08 A.M. PST 14 03 P.M. PST 14 08 P.M. PST 14 08 P.M. PST 18 00 A.M. PST MAR. 19 04 P.M. PST 21 06 A.M. PST 21 12 P.M. PST 21 10 P.M. PST 22 00 A.M. PST 25 04 P.M. PST 25 04 P.M. PST 25 05 P.M. PST 25 06 P.M. PST 25 08 P.M. PST

26 08 P.M. PST

27 08 A.M. PST 30 OS P.M. PST 2 06 A.M. PST 5 01 A.M. PST 5 04 P.M. PST 5 OS P.M. PST 6 04 A.M. PST 7 OS A.M. PST 8 12 P.M. PST

3 10 A.M. PST 7 07 A.M. PST 8 06 A.M. PST

JAN. JAN. 11 JAN. 12 JAN. 18 JAN. 24 JAN. 27 JAN. JAN. 29

JAN.

JAN. JAN. JAN. 11 JAN. JAN. 20 JAN. 22 JAN. 23 JAN. 23 JAN. 25 JAN. 30 FEB. FEB. FEB. FEB. FEB. FEB. 15 FEB. FEB. FEB. 21 FEB. FEB. 24 FEB. 25 MAR.

FEB. 13 FEB. 22 FEB. 25

JAN. Table 1.--Summary of u.s. earthquakes for January-March 1978--Continued

19 28 10.8 40.86 N. 125.23 w. 40.60 N. 126.20 w. 40.90 N. 125.75 w. 40.53 N. 124.83 w. 34.61 N. 33.25 N. 118.95 w. 40.20 N. 124.60 w. 40.41 N. 124.93 w.

19.33 N. 155.18 w. 19.32 N. 155.27 w. 19.33 N. 19.53 N. 155.95 w. 19.80 N. 155.09 w. 19.32 N. 155.12 w. 19.33 N. 155.06 w. 19.34 N. 155.07 w. 19.33 N. 155.10 w. 19.38 N. 19.33 N. 155.23 w. 19.33 N. 155.13 w. 19.43 N. 19.20 N. 155.62 w. 19.40 N. 155.28 w. 19.32 N. 156.11 w. 19.32 N. 155.14 w. 19.02 N. 155.42 w. 19.37 N. 19.33 N. 19.45 N. 155.99 w. 19.44 N. 156.32 w. 19.33 N. 155.22 w. 19.33 N. 155.13 w. 19.44 N. 155.42 w. 19.33 N. 155.22 w. 19.37 N. 155.42 w. 19.47 N. 154.88 w. 19.17 N. 155.48 w. 19.35 N. 155.43 w. 19.48 N. 154.83 w. 18.55 N. 155.18 w. 19.42 N. 155.48 w.

45.06 N. 114.44 w. 44.61 N. 115.06 w. 44.64 N. 113.80 w. 44.50 N. 114.33 w. 44.28 N. 115.47 w.

44.04 N.

------------------ intensity source -------------------

121.62 w.

155.22 w.

156.36 w.

155.30 w.

155.09 w. 155.10 w.

MAINE 70.51 w.

Al3

3. 8B
4. 3P
5. 6B
6. 7H

3.2H 3.8H 3.0H 3.0H 3.3H

3. 7H
4. 6H

3.2H 3.2H 3.3H 3.0H 3.5H 3.1H 3.4H 3.0H 3.0H 3.1H 3.3H 3.1H 3.1H 3.2H

3. 7H

3.1H 3.2H 3.0H 3.3H 3.0H 3.0H 3.1H 3.1H 3.4H 3.3H

3.3G 3.8G 3.2G 4.1G

3.2J B B B B G

IV .

IV H IV H IV H III H

H IV H IV H III H H H H IV H H III H H H H H H H III H IV H MAR.

H MAR. 10 05 A.M. HST H MAR. 17 02 A.M. HST H MAR. 17 02 A.M. HST III H MAR. 20 07 P.M. HST H MAR. 24 01 P.M. HST H MAR. 26 07 P.M. HST H MAR. 27 11 A.M. HST H MAR. 27 09 P.M. HST H MAR. 28 03 P.M. HST H MAR. 31 05 A.M. HST

G G G MAR. 18 07 P.M. MST G MAR. 22 07 A.M. MST

IV J JAN. JAN. 11 10 A.M. PST JAN. 12 00 A.M. PST JAN. 18 08 A.M. PST JAN. 24 05 A.M. PST JAN. 27 08 A.M. PST JAN. 28 09 P.M. PST JAN. 28 10 P.M. PST

JAN. 12 04 P.M. EST

JAN. JAN. JAN. 10 10 P.M. HST JAN. 12 02 P.M. HST JAN. 19 03 P.M. HST JAN. 22 05 A.M. HST JAN. 22 08 P.M. HST JAN. 23 08 P.M. HST JAN. 24 03 P.M. HST JAN. 30 00 A.M. HST FEB. FEB. FEB. FEB.

12 05 A.M. HST FEB. 14 10 A.M. HST FEB. 15 06 A.M. HST FEB. 18 02 P.M. HST FEB. 19 11 A.M. HST FEB. 21 01 A.M. HST FEB. 23 06 A.M. HST FEB. 24 08 A.M. HST FEB. 24 10 P.M. HST

FEB. 13 10 A.M. MST FEB. 21 05 P.M. MST FEB. 25 02 P.M. MST

JAN. 1 10 P.M. PST

4 08 A.M. HST 5 03 A.M. HST

2 11 A.M. HST 2 04 P.M. HST 2 07 P.M. HST

2 00 A.M. HST

4 02 P.M. EST

JAN. MAR. 24 MAR. 29

JAN. 13 JAN. JAN. JAN. JAN. 24 FEB. FEB. 14 FEB. FEB. 23

MAR. 15 MAR. 23

JAN. FEB. FEB. FEB. FEB. 23 FEB. 24

JAN.

MAR.

19 49 48.8 00 20 6.5 44.77N. 47.22 N. 44.73 N.

39.42 N. 117.60 w. 37.63 N. 117.84 w. 37.63 N. 117.84 w. 39.15 N. 39.04 N. 118.07 w. 3 7.14 N. 116.04 w. 39.63 N. 117.18W. 39.53 N. 118.45 w. 3 7. 12 N. 116.06 w. 38.94 N. 118.03 w. 38.35 N. 118.22 w. 3 7.11 N. 116.11 w. 37.10 N. 116.05 w.

43.10 N.

41.35 N.

36.19 N. 36.20N.

34.07 N.

43.26 N. 12 6. 63 w. 43.84 N. 12 8. 05 w. 43.55 N. 42.68 N. 126.03 w. 44.10 N. 42.91 N.

36.25 N.

31.56 N. 102.51 w.

38.33 N. 112.83 W. 40.76 N. 112.20 W. 111.94 w. 113.33 w. 111.74W.

119.62 w.

71. 63 l-7.

74.15 w.

79.30 w.

81.73 w.

97.40 w.

126.96 w. 129.25 w. 12 6. 57 w.

89.42 w.

A14

4.5 4.7 4.1 5.0 4.5 4.3 3.7 4.2 4.5 3.6G 3.8G 3.0D

3. 7B
4. OB
5. 7B
6. 6B
7. 4B
8. 5B

3.0U 2.7U II G

v G JAN. 12 0 7 P.M. PST B B G G G v G FEB. 13 08 P.M. PST G E

IV G G MAR. 16 07 A.M. PST E

IV V V MAR. 22 10 A.M. EST

G G G G G G

V U JAN. 14 09 A.M. MST MAR. 24 11 A.M. MST 28 08 P.M. MST

JAN. 17 10 P.M. PST JAN. 18 00 A.M. PST JAN. 21 09 A.M. PST JAN. 24 02 P.M. PST FEB. 13 01 P.M. PST FEB. 15 01 A.M. PST FEB. 23 09 A.M. PST

MAR. 14 07 P.M. PST MAR. 23 08 A.M. PST

MAR. 31 09 A.M. EST

MAR.

FEB. 24 10 P.M. EST

JAN. JAN. 31 09 P.M. PST FEB. FEB. 16 04 A.M. PST FEB. 23 04 A.M. PST FEB. 23 10 P.M. PST

JAN. 18 05 p.~1. CST

MAR.

FEB. 24 12 P.M. MST FEB. 27 05 p.M. MST 5 02 P.M. PST

5 02 A.M. EST

9 00 A.M. CST

4 08 A.M. PST 6 01 A.M. PST

2 04 A.M. CST

MAR.

MAR.

JAN. FEB. FEB. FEB. MAR. MAR.

March {G) Northern Alabama Origin time: Epicenter: Depth: Magnitude: Intensity III: Huntsville area (V). Table 1.--Summary of U.S. earthquakes for January-March 1978--Continued

Table 2.--Summary of macroseismic data for u.s. earthquakes, January-March 1978

[Sources of the hypocenters and magnitudes:

University of Alaska, Fairbanks; (B) University of California, Berkeley;

(D) University of Montana, Missoula; (E) u.s. Department of Energy, Las Vegas, Information Service; {H) u.s. Geological Survey, Hawaiian Volcano Observatory; Geological Observatory, Palisades, New York; Atmospheric Administration, Alaska Tsunami Warning Center, Palmer; (0) Earth Physics Branch, Seismological Service of Canada, Ottawa; California Institute of Technology, Pasadena; St. Louis, Missouri; (T) University of Oklahoma, Leonard; (U) University of Utah, Salt Lake City; University, Blacksburg; (W) University of Washington, and origin times are listed in Universal Coordinated Time (UTC) giving the hour, minute, and second. Epicenters are shown in decimal degrees. Only earthquakes with intensity data and explosions are listed]

40.76 No 40.77 N. 40.76 N.

48.06 No 47.42 N. 122-71 w. 48.20 N. 122 0 76 w. 47.42 N. 122.72 l-J.

42.43 N. 105.31 w0 44.39 N. 44.38 N. 42.50 N. 44.43 N. 44.30 N. 43.80 N.

Nevada; (G)

(J) Weston Observatory, Massachusetts; (L) Lamont-Doherty

04 08 26.6 34.42 N., 86.61 w. 5 km 2.5 mbLg 112.08 w. 112.08 w. 112 0 08 w.

80.74 w.

123 0 00 w0 57

110.81 w. 110.83 w. 109.70 w. 110. 84 w. 110.92 w. 110.18 w.

u.s. Geological Survey, National Earthquake UTAH--Continued

(V) Virginia Polytechnic Institute and State

Al5

5 January (G) Southern Alaska Origin time: Epicenter: Depth: Magnitude: Intensity III: Anchorage (M), Wasilla (M). Intensity II: Palmer (M).

4. 8G 2.7G 4.2G

3.0G 3.4G 3.1G 3.3G 3.5G 3.1G 3.2G

(M) National Oceanic and

(S) St. Louis University, VI U IV U IV U

IV V MAR.

IV w MAR.

VI w MAR. 11 07 A.M. PST IV w MAR.

v \1' MAR. A.M. PST

III G III G III G G v G MAR. IV G MAR.

G MAR. 10 00

Seattle.

19 56 09.8 61.33 N., 15l.65 w. 110 km 4.4 mb MAR.

13 06 A.M. MST

17 01 P.M. EST

29 04 A.M. PST

JAN. 15 08 FEB. FEB. FEB.

(P)

Dates 8 11 P.M. MST 8 11 P.M. MST

5 10 A.M. PST

P.M. MST P.M. MST 1 05 A.M. HST 2 05 P.M. MST 6 10 P.M. MST 6 06 A.M. MST 7 00 A.M. MST Table 2.--Summary of macroseismic data for

6 January (G) Andreano£ Islands, Aleutian Islands Origin time: Epicenter: Depth: Magnitude: Intensity IV: Adak (M).

6 January (G) Kenai Peninsula Origin time: Epicenter: Depth: Magnitude: Intensity V:

Intensity IV: Anchorage, Chugiak, Clam

Intensity III: Elmendorf AFB, Moose Pass,

9 January (G) Southern Alaska Origin time: Epicenter: Depth: Magnitude: Intensity III: Anchorage, Lower Susitna

9 January (G) Andreano£ Islands, Aleutian Islands Origin time: Epicenter: Depth: Magnitude: Intensity II: Adak (M).

10 January (A) Central Alaska Origin time: Epicenter: Depth: Magnitude: Intensity III: Fairbanks.

18 January (G) Fox Origin time: Epicenter: Depth: Magnitude: Intensity IV:

22 January (G) Cook Inlet Origin time: Epicenter: Depth: Magnitude: Intensity III: Anchorage (M).

27 January (G) Kenai Peninsula Origin time: Epicenter: Depth:

U.S. earthquakes, January-March 1978

not broken).

Gulch, Cooper Landing, Eagle River, Kenai, Ouzinkie, Seward, Soldotna, Whittier.

Palmer.

Valley, Matanuska.

Islands, Aleutian Islands 07 08 43.8 51.78 N., 176.01 w. 63 km 5.3 mb

21 59 01.1 60.91 N., 149.38 w. 45 km 4.6 mb, 4.9 ML(M) Girdwood (small objects fell,

07 06 05. 8 62.00 N., 148.82 w. 9 km 3.5 ML(M)

22 18 14.6 51.61 N., 177.17 w. 121 km 3.9 mb

64. 74 N., 14 7. 44 w.

24 km 2.8 ML(M)

52. 92 N., 166.43 W.

70 km None computed. Unalaska (M).

02 02 54.0 60.24 N., 152.33 w. 115 km None computed.

18 52 59.2 60.37 N., 151.12 w. 70 km

Al6

Table 2.--Summary of macroseismic data for

28 January (G) Kenai Peninsula

12 February (G) Cook Inlet

16 February (G) Southern Alaska

6 March (G) Andreano£ Islands, Aleutian Islands

20 March (G) Southern Alaska

20 March (G) Southern Alaska

31 March (G) Southern Alaska U.S. earthquakes, January-March 1978

Magnitude:

Intensity III: Anchorage (M), Eagle River (M), Kenai (M), Soldotna (M).

Origin time: Epicenter: Depth: Magnitude: Intensity III: Intensity II:

Origin time: Epicenter: Depth: Magnitude: Intensity V: Intensity IV: Seldovia. Intensity III: Kodiak, Kokhanok, Port Graham. Intensity II:

King Salmon (M) •

Origin time: Epicenter: Depth: Magnitude: Intensity IV: Chitina.

Origin time: Epicenter: Depth: Magnitude: Intensity II: Adak (M).

Origin time: Epicenter : Depth: Magnitude: Intensity II: Anchorage (M), Homer (M).

Origin time: Epicenter: Depth: _ Magnitude: Intensity III: Soldotna (M). Intensity II:

Origin time: Epicenter: Depth: Magnitude: Intensity V:

pictures swung; buildings creaked), Skwentna (hanging pictures swung; windows, 4.7 mb

18 53 06.8 60.07 N., 151.33 W. 77 km 4.5 mb Kenai (M), Nikishka (M). Anchorage (M) •

08 56 38.9 59.45 N., 152.62 w. 72 km 5.4 mb Anchor Point, Homer, Ouzinkie.

English Bay (M), Homer (M),

20 53 49.0 61.31 N., 144.89 w. Normal. 4.1 Ml(M)

18 40 23.6 51.76 N., 175.81 W. 65 km 4.7 mb

03 59 05.0 60 • 18 N. , 15 3. 61 W. 153 km 4.9 mb

08 15 3 7. 5 59.84 N., 153.24 w. 134 km 3.8 mb

Homer (M), Kenai (M).

00 38 13.4 61.77 N., 151.41 w. 90 km 5.1 mb Cooper landing (hanging Table 2.--Summary of macroseismic data for U.S. earthquakes, January-March 1978

doors, dishes rattled; buildings creaked), Wasilla (hanging pictures swung; windows, doors, dishes rattled; buildings creaked). Intensity IV: Anchorage (M), Chugiak, Girdwood, Kasilof, Kenai, Talkeetna, Tyonek, Whittier, Willow. Intensity III: Elmendorf AFB, Homer (M), Moose Pass, Palmer (M).

10 March (P) Baja Origin time: Epicenter: Depth: Magnitude: Intensity III: Yuma (telephone report).

11 March (G) Baja Origin time: Epicenter: Depth: Magnitude:

This earthquake destroyed approximately 30

Intensity VI: Arizona--Yuma (cracked

Intensity III: California--El Centro (press

12 March (G) Baja California Origin time: Epicenter: Depth: Magnitude: Intensity IV: Arizona--Yuma. Intensity III: California--southern Imperial

12 March (G) Baja California Origin time: Epicenter: Depth: Magnitude:

In tens i 9:...Y!.:

16 March (P) Baja California Origin time: Epicenter: Alaska--Continued

houses, cracked dozens of buildings, and interrupted electric power and telephone communications in the cities of San Luis, Sonora, and Luis Sanchez, Mexico.

plaster).

report).

Valley (telephone report).

Arizona--Yuma (cracked plaster, cracked streets).

Arizona--Somerton. California--Imperial, Winterhaven.

California 20 34 36.2 32.33 N., 115.03 W. 5 km 3.5 ML

California 23 57 46.8 32.26 N., 115.12 W. 5km 4.8 mb, 5.0 ML(P)

00 30 15.7 32.23 N., 115.14 W. 5 km 4.5 mb, 4.7 ML(P)

18 42 24.3 32.26 N., 115.11 W. 5km 4.9 mb, 4.9 ML(P)

01 51 10. 1 32.30 N., 115.12 w.

Al7

Table 2.--Summary of macroseismic data for

4 Januar1 (B) Northern California

6 January (B) Northern California

14 January (B) Northern California

15 January (B) Northern California

17 January (B) Northern California

25 January (P) Southern California

28 January (B) Northern California U.S. earthquakes, January-March 1978

Depth: Magnitude: Intensity IV:

Origin time: Epicenter: Depth: Magnitude: Intens±ty IV: Ferndale, Fortuna. Intensity III: Eel River Valley.

Origin time: Epicenter: Depth: Magnitude: Intensity V:

Origin time: Epicenter: Depth: Magnitude: Intensity Ill: Southern Lake County (press report).

Origin time: Epicenter: Depth: Magnitude: Intensity IV: Ukiah (press report). Intensity III: Willits (press report).

Origin time: Epicenter: Depth: Magnitude: Intensity V_:

wall, dishes rattled, buildings swayed--press report).

Origin time: Epicenter: Depth: Magnitude: Intensity III: La Crescenta, Sylmar.

Origin time: Epicenter: Depth: Magnitude: Intensity V:

objects moved; people awakened; windows, doors, dishes rattled).

5 km 4.2 mb(G), 4.2 ML Yuma.

12 23 02.7 40.57 N., 124.55 w. 29 km 3.5 ML

10 42 44.9 39.35 N., 123.16 w. 2 km 3.0 ML Willits.

15 45 44.8 38.92 N., 122.92 w. 11 km

3. 1 ML

14 38 26.1 39.17 N., 123.24 w.

20 59 12.6 39.19 N., 123.24 w.

2.8 ML Ukiah (hairline crack in the

10 40 50.0 34.32 N., 118.33 w. 5 km 2.7 ML

08 49 02.5 39.40 N., 123.35 w. 5 km 2.5 ML(B) Willits (furniture and small Table 2.--Summary of macroseismic data for U.S.

31 January (P) Southern California Origin time: Epicenter: Depth: Magnitude: Intensity III: Canoga Park, Chatsworth.

6 February (P) Southern California Origin time: Epicenter: Depth: Magnitude: Intensity III: Palm Springs.

6 February (P) Southern California Origin time: Epicenter: Depth: Magnitude: In tens it! II I : Palm Springs.

6 February (P) Imperial Valley Origin time: Epicenter: Depth: Magnitude: Intensity V:

Intensity III: Brawley (telephone report).

7 February (B) Northern California Origin time: Epicenter: Depth: Magnitude: Intensity V:

February (P) Imperial Valley Origin time: Epicenter: Depth: 'f.'f.agni tude: In tens it! II: Brawley.

February (P) Imperial Valley Origin time: Epicenter: Depth: Magnitude: Intensitl II: Brawley.

February (P) Imperial Valley Origin time: Epicenter: Magnitude: Depth: In ten sit! III: Brawley.

windows, doors, dishes rattled; buildings shook).

objects shifted; buildings shook; windows, doors, dishes rattled).

14 18 10.0 34.18 N., 118.63 w. 6 km 2.1 ML

00 39 25.8 34.03 N., 116.78 w. 6 km 3.1 Ml

01 01 28.9 34.03 N., 116.78 w. 6 km 3.3 ML

12 57 14.2 33.25 N., ll5.57 w. 4 km 3.4 ML Niland (many awakened;

13 39 22.7 39.41 N., 123.17 W. 5 km 2.7 ML(B) Willits (many awakened; small

01 45 30.5 33.02 N., 115.53 w. 7 km

2. 5 ML

01 45 51.0 33.02 N., 115.53 w. 5km 2.5 ML

02 25 51.4 33.02 N., 115.53 w. 3.1 ML 6 km

AlB

Table 2.--Summary of macroseismic data for U.S.

13 February (P) Southern California

14 February (B) Northern California

14 February (B) Northern California

14 February (B) Northern California

23 February (P) Imperial Valley

March (P) Southern California earthquakes, January-March 1978

Origin time:

Epicenter:

Depth: Magnitude: Intensity II: Redlands.

Origin time:

Epicenter: Depth: Magnitude: Intensity II:

Origin time: Epicenter: Depth: Magnitude: In tens it! II: Santa Rosa.

Origin time: Epicenter: Depth: Magnitude: Intensit! IV: Rio Dell. Intensity III: Ferndale, Fortuna.

Origin time: Epicenter: Depth: Magnitude: Intensity V:

doors, dishes rattled; hanging pictures swung, hanging objects swung slightly). Intensity IV:

Origin time: Epicenter: Depth: Magnitude: Intensity VI: White Water (cracked plaster;

light furniture shifted). Intensity V: Colton, Fawnskin, Highland. Intensity IV: Angelus Oaks, Apple Valley, Big Bear City, Bryn Mawr, Chino, Crestline, Etiwanda, Green Valley lake, Montrose, Mount Baldy, Palomar Mountain, Rimforest, San Bernardino, Twin Peaks. Intensity III: Barstow, Big Bear lake, Crest Park, Del Rosa, lake Arrowhead, Lucerne Valley, Newberry Springs, Norton AFB, Victorville (press report). Intensity II: Azusa, Blue Jay, Burbank, Daggett, West Covina (press report), Wrightwood. 18 04 06.3 34.02 N., 117.22 w. 6 km 2.9 ML

16 33 46.8 38.42 N., 122 • 66 W• 9 km 2.8 ML Santa Rosa.

20 03 09.5 38.42 N. ,. 122.66 w. 9 km 2.5 ML

21 03 55.8 40.20 N., 124.00 W. 10 km 3.0 ML

16 43 03.7 32.82 N., 115.60 w. 19 km 3.6 ML Seeley (felt by all; windows,

Imperial.

04 54 31.2 34.53 N., 116.77 w. 5 km 4.4 ML, 4.4 Ml(B)

Table 2.--Summary of macroseismic data for U.S.

8 March {P) Southern California Origin time: Epicenter: Depth: Magnitude: Intensity IV: Anaheim (Brookhurst Center,

Intensity III: Brea (press report), Buena

11 March (G) Baja California Origin time:

See Arizona listing.

12 March (G) Baja California Origin time:

See Arizona listing.

12 March (G) Baja California Origin time:

See Arizona listing.

13 March (P) Southern California Origin time: Epicenter: Depth: Magnitude: Intensity VI: La Mirada (cracked. plaster). Intensity V:

Intensity IV: Anaheim (press report),

Intensity III: Alhambra, Brea (press report),

Intensity II: La Puente, Norwalk, Santa Ana.

14 March {P) Southern California Origin time: Epic en te r : Depth: Magnitude: Intensity IV: La Habra. Intensity III: Fullerton, Santa Fe Springs,

15 March (P) Imperial Valley Origin time: Epicenter: Depth: Magnitude: Intensity III: El Centro, Imperial (telephone earthquakes, January-March 1978

Sunkist), Fullerton, Long Beach, Orange, Placentia, Santa Ana, Westminster.

Park (press report), Cypress (press report), Garden Grove, La Mirada, Midway City, Stanton, Sunny Hills, Tustin (press report), Yorba Linda.

Surfside.

Bellflower, Fullerton, Perry, Pico Rivera, Whit tier.

Compton, Manhattan Beach, Rowland Heights.

Whittier.

report). 14 49 34.9

33. 83 N., 11 7. 88 W.

5 km 2.9 ML

16 38 15.7 33.93 N., 117.98 w. 4 km 3.2 ML

Buena Park, La Habra,

16 09 51.2 33 • 9 5 N• , 11 7 • 9 7 W. 4 km 2.5 ML

04 02 49.4 32.78 N., 115.53 w. 5 km 2.9 ML

A19

Table 2.--Summary of macroseismic data for U.S.

15 March (P) Imperial Valley

20 March (P) Southern California

21 March {B) Northern California

26 March (B) Northern California

Loss of about $10,000 from glass bottles and containers being thrown to the floor and broken was sustained by grocery and liquor stores in the Ukiah area. This earthquake triggered three accelerographs located at Coyote Dam near Ukiah (Porcella, 1978). The accelerographs are located at the center crest, center toe, and south abutment of the dam. Maximum acceleration recorded at the crest was 0.30 ~· at the toe was 0.34 ~· and at the south abutment was 0. 20 .&· The press reported damage at a new warehouse at the Parducci Winery south of Ukiah. Huge storage tanks in the warehouse, welded to plates on the floor to hold them rigid, contained 200 tons of liquid. The liquid moved and about 1,000 gallons spilled, damaging the tanks. Liquid in free-floating tanks in another building sustained minor spillage, but there was no damage to the tanks. The drop ceiling in the new warehouse was also damaged.

Cal if orn ia --Continued

Origin time: Epicenter: Depth: Magnitude: Intensity III: El Centro, Imperial (telephone report).

Origin time: Epicenter: Depth: Magnitude: Intensity III: Haiwee Reservoir (telephone report).

Origin time: Epicenter: Depth: Magnitude: Intensity IV: Bayside, Loleta, Rio Dell, Scotia. Intensity III: Ferndale.

Origin time: Epicenter: Depth: Magnitude:

This earthquake was felt over an area of about 8,200 sq km centered in the Ukiah area (fig. 7). 04 09 39.7 32.78 N., 115.57 w. 5 km 3.2 ML

00 07 56.7 36.00 N., 117.87 w. 1 km 3.0 ML, 3.6 ML(B)

14 05 12. 1 40.44 N., 124.45 W~ 11 km 3.5 ML

00 27 04.4 39.19 N., 123.20 w. 10 km 4.9 mb(G), 4.4 ML FIGURE 7.--Isoseismal map for the northern

Table 2.--Summary of macroseismic data for U.S.

Intensity VI: Comptche (windows broken),

Intensity V:

Intensity IV: Albion, Clearlake Park,

Intensity III: Hopland, Upper Lake. Intensity II: Loch Lomond.

26 March (B) Northern California Origin time: Epicenter: Depth: Magnitude: Intensity IV: Talmage, Ukiah. Intensity III: Willits.

26 March (B) Northern California Origin time: Epicenter: California earthquake of 26 March 1978, 04.4 represent Modified Mercalli intensities between isoseismals; are use to represent these intensities at specific sites.

Ukiah (pictures fell, glass bottles and jars broken in grocery and liquor stores, burglar alarm set off, damage to Parducci Winery).

Highlands, Finley, Kelseyville, Lakeport, Manchester, Potter Valley, Redwood Valley, Talmage, Willits, Witter Springs.

Cloverdale, Elk, Fort Bragg, Glenhaven, Lucerne, Mendocino, Monte Rio, Navarro, Philo, Stewarts Point, Westport.

00 34 11.7 39.22 N., 123.18 w. 5 km

01 19 09.7 39.19 N., 123.17 w.

A20

Table 2.--Summary of macroseismic data for U.S.

26 March (B) Northern California

26 March (B) Northern California

27 March (B) Northern California

The locations listed below that are followed by (H) designate intensity values assigned by the Hawaiian Volcano Observatory. 4 January (H) Island of Hawaii

5 January (H) Island of Hawaii earthquakes, January-March 1978

Depth: Magnitude: Intensity IV: Talmage, Ukiah. Intensity III: Willits.

Origin time: Epicenter: Depth: Magnitude: Intensity IV: Intensity III:

Origin time: Epicenter: Depth: Magnitude: Intensity IV: Talmage, Ukiah. Intensity III: Comptche, Willits.

Origin time: Epicenter: Depth: Magnitude: Intensity V: Intensity IV: Intensity III:

Origin time: Epicenter: Depth: Magnitude: Intensity IV: Haines City (press report).

Origin time:

Epicenter:

Depth:

Magnitude:

Intensity IV: Hilo (H).

Intensity III: Kurtistown (H), Laupahoehoe (H), Volcano (H).

Origin time:

Epicenter:

Depth:

Magnitude:

Intensity IV: Ainahou Ranch (H). California--Continued

Central Florida 10 km 3.6 mb(G), 3.6 ML

02 29 16.6 39.20 N., 123.23 W. 10 km 3.3ML Talmage, Ukiah. Willits.

04 28 18.7 39.20 N., 123.21 w. 10 km 3.5 ML

08 44 03.0 40.43 N., 124.31 W. 14 km 3.2 ML Rio Dell. Ferndale, Fortuna. Scotia (press report), Weotl.

21 10 Not located. None computed. None computed.

18 42 27.2 19.33 N., 155.18 w. 10 km 3.7 ML

13 58 46.6 19.32 N., 155.27 w. 10 km 3.2 ML Table 2.--Summary of macroseismic data for U.S.

11 January (H) Island of Hawaii Origin time: Epicenter: Depth: Magnitude: Intensity IV: Hilo (H). Intensity III: Glenwood (H), Hamakua (H),

13 January (H) Island of Hawaii Origin time: Epicenter: Depth: Magnitude: Intensity III: Kona (H).

23 January (H) Island of Hawaii Origin time: Epicenter: Depth: Magnitude: Intensity IV: Glenwood (H), Hilo (H),

Intensity III: Papaikou (H).

23 January (H) Island of Hawaii Origin time: Epicenter: Depth:

Intensity IV: Glenwood (H), Hilo (H),

Intensi~: Papaikou (H).

25 January (H) Island of Hawaii Origin time: Epicenter: Depth: Magnitude: In tensity III:

3 February (H) Island of Hawaii Origin time: Epicenter: Depth: Magnitude: Intensity IV: Glenwood (H), Hilo (H),

Intensity III: Honomu (H), Papaikou (H).

14 February (H) Island of Hawaii Origin time: Epicenter: Depth: Magnitude: Intensity III: Hawaiian Volcano Observatory earthquakes, January-March 1978

Mountain View (H), Puna (H), Volcano (H) •

Kalapana (H), Kurtistown (H), Mountain View (H), Volcano (H).

Kurtistown (H), Mountain View (H), Volcano (H).

Kurtistown {H), Mountain View (H), Volcano (H).

(H), Volcano (H). 08 33 11.3 19.33 N., 155.22 w. 10 km 3.8 Ml

00 34 06.1 19.53 N., 155.95 w. 10 km 3.0 Ml

06 21 38.5 19.33 N., 155.06 w. 9 km 3.7 Ml

06 28 26.9 19.34 N., 155.07 W. 9 km 3.6 Ml

01 18 16.8 19.33 N., 155.10 W. 9krn 3.2 Ml Hilo (H).

OS 32 45.8 19.43 N., 155.30 w. 16 krn 3.5 ML

20 OS 06.2 19.40 N., 155.28 W. 15 krn 3.4 Ml

A21

Table 2.--Surnrnary of macroseismic data for U.S.

25 February (H) Island of Hawaii

2 March (H) Island

21 March (H) Island

4 January (J) Southwestern Maine

24 March {G) Southwest of Bermuda Islands

14 January (G) Southwestern Montana earthquakes, January-March 1978

Origin time: Epicenter: Depth : t1agnitude: Intensity III: Holualoa.

Origin time: Epicenter: Depth: Magnitude: Intensity IV:

Origin time: Epicenter: Depth: Magnitude: Intensity III:

Origin time: Epicenter: Depth: Magnitude: Intensity IV: Cisco (J), Naples (press report), Otisfield (press report). Intensity III: Harrison (J), Oxford (J), Poland (J). Intensity II: Bridgton (J), Canton (J), Johnson Hill (J), West Poland (J).

Origin time:

Epicenter:

Depth: Magnitude:

Intensity IV:

Massachusetts--New Bedford.

Intensity III:

Massachusetts--Boston (press report).

North Carolina--Asheville (press report), Camp lejune (press report), Hatteras (press report), Wake County (press report).

Origin time: 08 55 27.2 19.44 N., 156.32 w. 1 7 km 3.2 Ml

of Hawaii 10 51 02.9 19.33 N., 155.22 W. 9 km 3.7 Ml Hilo (H), Volcano (H).

of Hawaii OS 13 25.4

19. 3 7 N. , 155. 42 W.

12 km 3.3 Ml Kukaiau Ranch.

19 28 10.8 44.04 N., 70.51 w. 0 km 3.2 mblg, 3.2 mblg(l)

00 42 38.2 29.86 N., 67.39 w. 22 km 6.1 mb, 6.0 MS, 6.1 MS(B), 6.0 MS(P)

16 53 SO. 3 Table 2.--Summary of macroseismic data for U.S.

13 January (G) Southern Nevada Origin time: Epicenter: Depth: Magnitude: Intensitx V:

14 February (G) Southern Nevada Origin time: Epicenter: Depth: Magnitude: Intensitx V:

Intensitx IV: Gabbs.

Intensitx II: Manhattan.

23 February (E) Southern Nevada Origin time: Epicenter: Depth: Magnitude:

Nevada Test Site explosion "REBLOCHON" at 37n

5 March (G) Northern Nevada Origin time: Epicenter: Depth: Magnitude: Intensitx V:

15 March (G) Western Nevada Origin time: Epicenter: Depth: Magnitude: Intensitx IV: Gabbs, Luning, Mina.

23 March (E) Southern Nevada Origin time: Epicenter: Depth: Magnitude:

Nevada Test Site explosion "ICEBERG" at 37° earthquakes, January-March 1978

Epicenter: Depth: Magnitude: Intensity II: Lake Village (Yellowstone National Park).

Mountain, Yerington.

07'25.24" N., 116:>03'49.79" w., surface elevation 1288 m, depth of burial 658 m.

06'06.39"W., 116°03'04.13"W., surface elevation 1266 m, depth of burial 640 m.

44.77 N., 111.94 w.

5 km 3.6 ML

03 39 37.0 39.42 N., 117.60 w. 5km 4.1 ML(B) Austin.

04 35 24.0 39.63 N., 117.18 w. 5 km 4.4 mb, 4.8 ML(B) Austin, Eureka, Round

17 00 00.164 37.12 N., 116.06 w. 0 km 5.7 mb(G), 5.4 ML(B)

22 46 18.2 38.94 N., 118.03 w. 5 km 4.0 mb, 4.6 ML(B) Gabbs (small objects. fell).

03 09 14.9 38.35 N., 118.22 w. 5 km 3.2 ML

16 30 00.200 37.10 N., 116.05 w. 0 km 5.7 mb(G), 5.5 ML(B)

18 January (S) Western Tennessee

A22

Table 2.--Summary of macroseismic data for U.S.

18 February (0) Southern Quebec

March (L) Southeastern New York

25 February (V) Northern North Carolina

22 March (V) Northern North Carolina

24 March (G) Southwest of Bermuda Islands

9 March (T) Southern Oklahoma earthquakes, January-March 1978

Origin time:

Epicenter:

Depth:

Magnitude:

In tensi tx V:

Quebec--Saint Donat de Montcalm region.

Intensitx IV:

New York--Rouses Point.

Origin time:

Epicenter: Depth: Magnitude: Intensitx III: Highland Mills (J).

Origin time: Epicenter: Depth: Magnitude: Intensitx IV: Burlington.

Origin time: Epicenter: Depth: Magnitude:

Foss ible explosion (V).

Origin time:

See Massachusetts listing.

Origin time: Epicenter: Depth: Magnitude: IntensitX II:

Origin time: Epicenter:

14 48 25.0 46.35 N., 74.11 w. 7 km 4.0 mb(G), 4.0 mblg, 3.8 mbLg(J)

07 53 25.6 41.35 N., 74.15 w. 5 km 2.1 mblg

03 53 27.7 36.19 N., 79.30 w.

15 52 26.7 36.20 N., 81.73 w. 1 km 2.9 mblg

06 30 51.2 34.07 N., 97.40 w. 5 km 2.5 mblg Simon area (T).

23 46 26.1 36.25 N., 89.42 w.

Table 2.--Summary of macroseismic data for U.S.

Depth:

Magnitude:

Intensity III: Ridgely (Tennessee Earthquake

2 March (G) Southwestern Texas Origin time: Epicenter: Depth: Magnitude: Intensity III: Kermit (telephone report).

28 February (U) Northern Utah Origin time: Epicenter: Depth: Magnitude: Intensity V: Intensity IV: Magna. Intensity III: Tooele. Intensity II: Farmington.

9 March (U) Northern Utah Origin time: Epicenter: Depth: Magnitude: Intensity VI: Magna (cracks in the exterior

Intensity V:

Intensity IV: Hooper, Murray.

Intensity III: Centerville (press report),

9 March (U) Northern Utah Origin time: Epicenter: Depth: Magnitude: Intensity IV: Magna (press report).

13 March (U) Nor them Utah Origin time: Epicenter: Depth: Magnitude: Intensity IV: Magna. Intensity III: Bountiful (press report),

Intensity II: Midvale.

Information Center).

wall of fire station no. 2; windows broken, plaster and dry wall cracked).

Lincoln, Midvale.

Granger (press report), Salt Lake City (Glendale area and University of Utah Hospital--press report). 2.6 mbLg

10 04 52.7 31.56 N., 102.51 w. 11 km 3.5 ML

40. 76 N., 112.20 w.

14 km 2.7 ML Salt Lake City.

06 30 51.8 40.76 N., 112.08 w. 9 km 3.3 ML

Salt Lake City.

06 46 20.0 40.77 N., 112.08 w.

13 35 43.4 40.76 N., ll2.08 w. 13 km 2.8 Ml Table 2.--Summary of macroseismic data for U.S.

17 March (V) Southwestern Virginia

5 March (W) Puget

11 March (W) Puget

Intensity VI: Crystal Mountain Ski Resort

Intensity IV:

A23

Origin time: Epicenter: Depth: Magnitude: Intensity IV: Galax, Hillsville, Lambsburg, laurel Fork, Woodlawn. Intensity III: Dugspur. Intensity II:

Sound area Origin time: Epicenter: Depth: Magnitude: Intensity IV: Intensity III:

British Columbia--Victoria (telephone report). Washington--North Seattle (telephone report), Oak Harbor (telephone report). Intensity II: Hansville.

Sotmd area Origin time: Epicenter: Depth: Magnitude:

This earthquake was felt over an area of 20,000 sq km of northwest Washington (fig. 8).

(crack in rock and mortar wall at the Summit House; open beams supporting the roof moved 1-2 em), Freeland (cracked plaster), Grotto (cracked plaster), Longbranch (cracked plaster and windows). Ashford, Bremerton, Centralia, Dockton, Enumclaw, Everett, Federal Way, Bohart, Issaquah, La Grande, leavenworth, Olympia, Port Orchard, Poulsbo, Preston, Redondo, Ronald, Seabeck, Seattle, Snoqualmie Pass, South Colby, Tacoma. Aberdeen, Allyn, Anderson Island, Baring, Belfair, Blakely Island, Brinnon, Burley, Cinebar, Clearlake, Des Moines, East Olympia, Eatonville, Fort Lewis (Gray Army Airfield), Fox Island, Gig Harbor, Glenoma, Hadlock, Hoodsport, Indianola, Kapowsin, Kent, La Conner, lakebay, little Rock, lyman, Lynnwood, McKenna, Medina, Milton, Mukilteo, Olalla, Olga, Orting, Pacific, Parkland, Port Virginia

18 26 34.5 36.75 N., 80.74 w. 7 km 2.8 mbLg

Austinville, Independence.

18 13 35.9 48.06 N., 123.00 W. 57 km 4.0 mb(G), 3.3 ML(G) Nordland.

15 52 ll.2 47.42 N., 122.71 W. 25 km 4.3 mb(G), 4.8 ML, 3.2 MS(G) FIGURE 8.--Isoseismal map for the Puget Sound, Washington, earthquake of 11 March 1978,

Table 2.--Summary of macroseismic data for U.S.

Angeles, Proctor, Puyallup, Ranier, Renton, Roy, Skykomish, Spanaway, Tillicum, Tracyton, Union, Vashon, Vaughn, Wilkeson, Winslow, Yelon.

11.2 UTC. Roman numerals represent Modified Mercalli intensities between isoseismals; Arabic numerals are used to represent these intensities at specific sites. Dashed line indicates the isoseismal is not well defined by the data.

CANADA

Table 2.--Summary of macroseismic data for U.S.

Intensity III: Buckley, Carbonado, Carnation,

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Fircrest, Fort Lewis, Gold Bar, Lake Stevens, Lakewood Center, McMillin, Napavine, Oakville, Randle, Redmond,

Washington--Continued Table 2.--Summary of macroseismic data for U.S.

Wallingford, Wenatchee (press report).

Intensity II: Bellevue, Edmonds, Fall City, Forest Park, Index, Lester, Lilliwaup, Mineral.

29 March (W) Northwest Washington Origin time: Epicenter: Depth: Magnitude: Intensity IV: Oak Harbor.

31 March (W) Puget Origin time: Epicenter: Depth: Magnitude:

This earthquake was felt over an area of 7,000 sq km of the Puget Sound area (fig. 9). Intensity V:

exterior walls), Brinnon, Chimacum,

Intensity IV: Auburn, Baring, Belfair,

Intensity III: La Grande.

Intensity II: Carnation, Nordland.

Seven earthquakes were felt in the eastern

16 January (G) Southeast Wyoming Origin time: Epicenter: Depth: Magnitude: Intensity III: 14.5 km north of Laramie, earthquakes, January-March 1978

Bremerton (hairline cracks in

Hadlock, Manchester, Olalla, Port Orchard, Port Ludlow, Poulsbo, Quilcene, Rollingbay, Seabeck, Seattle, Tacoma, Tracyton, Union.

Bellevue, Burley, Crystal Motmtain, Dockton, Fircrest, Fox Island, Hansville, Index, Indianola, Kapowsin, Kingston, Lilliwaup, Matlock, Medina, Olympia, Puyallup, Ravensdale, Tahuya, Vaughn.

part of the park from January 13 to 21. The largest magnitude of these quakes was about 1.8 ML. They were felt at Canyon Village and Lake, with the smaller magnitude events only being felt at lake. Maximum intensity was IV.

Wheatland (telephone report).

48. 20 N., 122. 76 W. 24 km 2.7 ML(G)

Sotmd area 08 03 00.2 47.42 N., 122.72 W. 23 km 4.2 ML(G)

7 March (G) Yellowstone National Park 03 50 03.1 42.43 N., 105.31 w. 5 km 3.0 ML

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Table 2.--Summary of macroseismic data for U.S.

2 February (G) Yellowstone National Park

2 February (G) Yellowstone National Park

7 March (G) Yellowstone National Park earthquakes, January-March 1978

Origin time: Epicenter: Depth: Magnitude: Intensity III: Old Faithful.

49 01.4 and 04 30 25.9 with magnitudes of 2.8 ML and 2.6 ML were also felt.)

Origin time: Epicenter: Depth: Magnitude: Intensity III: Old Faithful.

Origin time: Epicenter: Depth: Magnitude:

From March 7 at 01 09 UTC, to 18 30 UTC, a swarm of 129 tremors was felt at Old Faithful. This series was known to have immediately induced minor changes in the thermal activity in the Upper Geyser Basin. These included increased turbidity in Heart Spring and Calida, and more vigorous splashing in Tea Kettle, with a rise in water level. No changes in thermal activity occurred at the Norris Geyser Basin for 2.5 days after the swarm. But by March 23 Palpitar Spring had drained and the algae had died. At Steamboat Geyser minor eruptions appeared to have greater volume, and on March 28 the geyser had its first major eruption in 9 years. Rtmoff and sinter deposition at Cistun Springs had shifted from the west side of the pool to the southeast side, where two small trees were dying from the hot water (R. A. Hutchinson, National Park Service, written commun., 1978).

Intensity V:

Origin time: Epicenter: Depth: Magnitude: Intensity IV: Old Faithful. 00 36 25.6 44.39 N., 110.81 w. 5 km 3.6 mb, 3.4 ML, 3.6 ML(D) (Shocks at 00

12 35 56.2 44.38 N., 110.83 w. 4 km 3.3 mb, 3.1 ML, 3.5 ML(D)

01 10 47.6 44.43 N., 110.84 w. 5 km 3.7 mb, 3.5 ML, 3.8 ML(D)

Old Faithful.

07 39 33. 1 44.30 N., 110.92 w. 5 km 3.8 mb, 3.1 ML listed below are the furnished data Information Service for use in this Circular: ALASKA:

CALIFORNIA:

HAWAII:

MASSACHUSETTS: Edward F. Chiburis, Weston

MISSOURI:

FIGURE 9.--Isoseismal map for the Puget Sound, Washington, earthquake

Staff of National Oceanic and Atmospheric Administration, Alaska Tsunami Warning Center, Palmer. Clarence R. Allen, Seismological laboratory, California Institute of Technology, Pasadena. Bruce A. Bolt, Seismograph Station, University of California, Berkeley. Robert Y. Koyanagi, u.s.

Geological Survey, Hawaiian Volcano Observatory, Hawaii National Park.

Observatory, Weston. Otto Nuttli, Department of Geology and Geophysics, St. louis University, St. Louis.

n

of 31 March 1978. 08 03 00.2 UTC. Roman numerals represent Modified Mercalli intensities between isoseismals; Arabic numerals are used to represent these intensities at specific sites. Dashed line indicates the isoseismal is not well definded by the data.

collaborators who to the National Earthquake

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MONTANA:

NEW YORK:

OKLAHOMA:

UTAH:

VIRGINIA:

WASHINGTON:

Acknowledgment is also given to Paula Smith for aid in editing the manuscript, drafting the isoseismal maps, and preparing the computerized manuscript.

Anthony Qamar, University of Montana, Missoula. lynn R. Sykes and Yash P.

Aggarwal, Lamont-Doherty Geological Observatory, Columbia University, Palisades. James E. lawson, Jr., Earth Sciences Observatory, University of Oklahoma, leonard. Department of Geological and Geophysical Sciences, University of Utah, Salt lake City. G. A. Bollinger, Department of Geological Sciences., Virginia Polytechnic Institute and State University, Blacksburg. Robert s. Crosson, Geophysics Program, University of Washington, Seattle.

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