Seismic engineering program report, May-August 1980

PREFACE

This Seismic Engineering Program Report is an informal p~:;;riodical primarily intended to keep the ever-growing international community of strong-motion data users apprised of the nature and availability of da~:.a recovered by the Seismic Engineering Branch of the u.s. Geological Survey (u~GS). This Strong-Motion Program is administered by the USGS and supporte.... by the National Science Foundation (Grant CA-114) in cooperation with numerous Federal, State, and local agencies and organizations. Major objectives of the program include recording both strong ground motion and the response of various types of engineered structures during potentially damaging earthqu~kes and disseminating this strong-motion information and data to the earthquake engineering research and design community.

This issue contains a summary of the accelerograms rec;...vered from the USGS National Strong-Motion Network during the period May .i. through August 31, 1980. A report on the New Madrid Strong-Motion Network, a revision of strong-motion data recorded during the February 25, 1980, Horse Canyon (Anza) earthquake, and some comments about atypical accelero:lrams recorded during recent earthquakes are included along with summaries or recent strong-motion reports, notes on the availability of digitized data, and additional general information pertinent to the USGS and to other strong-~•~otion programs. The data summary included in table 1 contains, information un those accelerograms recovered (although not necessarily recorded) during the period May-August 1980; this procedure has been adopted so that the dissemination of strong-motion information may be as expeditious and current as practicable. Preface - - - - - -

Recent strong-motion records - -

Atypical accelerograms recorded during recent earthquakes

Revised strong-motion data, part I - - -

The New Madrid Strong-Motion Network - - -

Summaries of recent strong-motion reports - - - - - - - - - -

Strong-motion information, data reports, and availability of digitized data - - -

Data sources - - - - - - - - - - -

Errata - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Table 1 - Summary of accelerograms, May - August ~98U - - - - - - - -

2 - Strong-motion aata from the Horse Canyull earthquake - - - -

3 - Accelerograph stations in the New Mad£ld Network

4 - New Madrid strong-motion data - - - - - - - - - -

Figure 1 - Comparison of accelerograms from Bonds Corner, Cerro Prieto, and Long Valley Dam - - - - - - - - - - - - - - - - - - - - - 2 2 - Location map for the New Madrid Strong-f"IOtion Network - - - - - 9

RECENT STRONG-MOTION RECORDS

By R. L. Porcella and J. C. Switzer

The Mammoth Lakes, California, earthquake sequerce of May 1980 produced 153 strong-motion records from 34 USGS accelerographs located at six dams, two pumping plants, and one V.A. hospital in the San Joaquin Valley region. Most of these records are thought to be related to four magnitude 6+ earthquakes; their times of occurrerce (UTC) and local (Berkeley) magnitudes are May 25, 16:33, 6.1; May 25, 16:49, 6.0; May 25, 19:44, 6.1; and May 27, 14:50, 6.2. Because of the large epicentral distances for the USGS stations, only four of the 153 records contain peak accelerations greater than 0.05£ (see table 1, end of report). The California Division of Mines and Geology, Office of Strong-motion Studies (OSMS) recorded more than one thousand data traces on accelerographs located at 14 OSMS stations in the Mammoth Lakes region during the period May 25 through May 28; approximately 350 of these traces show peak accelerations greater than 0.05 ~ (Turpen, 1980).

Thirty additional records were recovered from the USGS National Network during the period May 1 to August 31, 1980. The magnitude 6.1 northern Mexico earthquake of June 9 triggered nine USGS accelerographs at Imperial Valley, California, strong-motion stations; a peak acceleration of 0.13 ~ and strong duration (acceleration greater than 0.1 ~) of 1.6 seconds was recorded at the Bonds Corner station. All other USGS recordings show ground accelerations less than 0.05 ~· Additional records were recovered in northern Mexico at seven stations jointly operated by the National University of Mexico and the University of California, San Diego. Maximum ground accelerations greater than 0.1 £ were recorded at three stations within 35 km of the epicenter; a digital accelerograph at Victoria (epicentral distance 7 km) recorded a maximum horizontal acceleration greater than 0. 8 ~ and a maximum vertical acceleration greater than 1. 0 ~' though parts of the recording could not be recovered (Anderson and others, 1982). An analog recorder at Cerro Prieto (epicentral distance 31 km) produced a maximum acceleration greater than 0.5 £ and strong shaking (greater than 0.1 ~) for about seven seconds (see the following report). reporting period include records related to earthquakes near Mays ville, Kentucky, and Bear Valley and Livermore, California (see table 1).

Refererces: Anderson, J. G., Prince, J., Brune, J. N., and

Turpen, C. D., 1980, Strong-motion records from

Mexico earthquake triggered seven strong-motion stations in Baja California (see "Recent Strong-Motion Records," this report). One of the accelerograms, recorded at the Cerro Prie~o station, is particularly interesting because 1t contains frequency spikes that are remarkably similar to acceleration traces recorded at the Bonus Corner station during the October 15, 1979, Imperial Matthiesen, 1979) and at the Long Valley Dam left abutment station during the May 1980 Mammoth Lakes earthquakes (Turpen, 1980; see figure 1). These three strong-motion statio~s are notably dissimilar in terms of geolog1c setting, housing, and local site conditions.

Simons, R. S., 1982, Strong-motion accelerograms, in Anderson, J. G., and Simons, R. s., eds~The Mexicali Valley earthquake of 9 June 1980: Research Institute Newsletter, v. 16, no. 3, p. 79-83.

the Mammoth Lakes earthquakes of May 1980: California Division of Mines and Geology Preliminary Report 27, 42 p.

The June 9, 1980, magnitude 6.1 northern

Bonds Corner is located approximately 15 km By R. L. Porcella

, .. 'w.~V\ '" 1'-V.rJ~... --- ·-·-~ .. .A..,...~-. J.1~J ..· -·-·----~~·.:s.~-- ·- .._.·..·..c...·.•·.-~-·-·-·-·-·-·-·-·-·-.--·-.·•• -·~.·.•

Figure 1.- Atypical accelerograms from Bonds Corner and Long Valley Dam, California and Cerro Prieto, Baja California. v

T~~~~·v"·lv-v}~/~.-,.r.JI~Jv/'.j.l~rr-JV~

Figure 1.- continued. Table 2.- Strong-motion data from the Horse Canyon (Anza) earthquake

Strong-motion station Name, Coordinates Epicentra1 Owner, I.D. number

Anza Fire Station USGS 5160

Borrego Air Ranch USGS 5049

Cabazon Post Office USGS 5073

Cherry Valley USGS 5074

Coachella Canal Sta. l USGS 2063

Cranston Forest Sta. USGS 5042

Fun Valley USGS 5069

Hurkey Creek Park USGS 5043

See footnotes at end of table of February 25, 1980

33.556 N 116.673 w

33.19 N 116.28 w

33.92 N 116.78 w

33.98 N 116.99 w

33.64 N 116.08 w

33.74 N 116.84 w

33.93 N 116.40 w

33.748 N 116.965 w

33.67 N 116.68 w

33.75 N 116.21 w Azimuth2

(km)

Up Duration3 Peak (_g)

1-peak Table 2.- Strong-motion data from the Horse Canyon (Anza) earthquake

Strong-motion station Name, Coordinates Epicentryl Owner, I.D. number

Mathews (Dike: Toe) USGS

Morongo Valley USGS 5071

N. Palm Springs .USGS 5070

Palm Desert CDMG C284 (5132)

Pinyon Flat Observ. USGS 5044

Puerta La Cruz CDMG Cl68 (933)

Rancho De Anza USGS 5047

San Bernardino Hilton CDMG C287 (5134)

San Jacinto CDMG C203 {5005)

San Jacinto CDMG C204 {5006)

See footnotes at end of table of February 25, 1980 - continued

33.852 N 117.451 w

34.05 N 116.58 w

33.92 N 116.54 w

33.762 N 116.407 w

33.61 N 116.46 w

33.32 N 116.68 w

33.35 N 116.40 w

33.580 N 116.932 w

34.065 N 117.279 w

33.784 N 116.948 w

33.80 N 116.88 w Azimuth2

(km)

Up Duration3 Peak (g)

.047 .064 .044 (s)

0.2 1-peak Table 2.- Strong-motion data from the Horse Canyon (Anza) earthquaKe

Name, Coordinates Owner, I.D. number

Terwi 11 iger Valley USGS 5045

Thousand Palms P.O. USGS 5068

Whitewater Trout Farm USGS 5072

Distance from epicenter at 33.51 N. lat., 116.53 W. long. When coordinates of station and/or source are listed to 0.01 degree, the implication is an accuracy in epicentral distance of approximately l km; a program of upgrading all station coordinates to 0.001 degrees is under way. 2 Azimuthal direction (degrees clockwise from north) of case acceleration for upward trace deflection on accelerogram; vertical component listeo as Up or Dow11. 3 Time between first and last peaks of acceleration greater than 0.10 ~· of February 25, 1980 - continued

33.48 N 116.59 w

33.82 N 116.40 w

33.99 N 116.66 w Azimuth2

(km)

53. 1 Ground acceleration

Up Peak Duration3 (_g)

.022 The Long Valley Dam strong-motion station is located in Owens Valley, Calif. , at Lake Crowley ; the dam abutments are founded on Pleistocene volcanic rock (Bishop Tuff). left abutment instrument is housed in a prefabricated corrugated iron shelter mounted on a concrete pad about 2x2x0. 3 m thick; less than 0.5 m of soil is present between the base of the pad and bedrock (R. McJunkin, oral commun., 1982).

The Cerro Prieto strong-motion station is located near the rim of Cerro Prieto volcano in Baja California, Mexico; the instrument is mounted in a 0.5x0.7x0.3-m-high metal enclosure. 0.8xl. 2 m concrete pad situated on a blocky basaltic material at an elevation of 170 m (J. Anderson, oral commun, 1982).

In addition to earthquake magnitudes, one notable similarity is that the events triggered three stations that contain SMA-1 triaxial accelerographs equipped with flexure-type 1 .9. accelerometers, which have a natural frequency of 25 Hz, 60 percent critical damping, bandwidth of 0.1-25 Hz, and a sensitivity or maximum 1 .9. deflection of about 18 mm on 70-mm photographic film. of the response during the strong ground motion, plans have been fmade to .install RFT -250 accelerographs alongside and interconnected with the SMA-1 instruments at Bonds Corner and Long Valley Dam left abutment. dings from these stations will contain some indication of the origin and nature of these high-frequency, large amplitude spikes. peak accelerations may not be representative and may have biased acceleration data for stations at similar distances in ground-motion attenuation studies.

The records from Bonds Corner and Cerro Prieto have been digitized and are available from the Environmental Data and Information Service; the Long Valley Dam processed data is available from CDMG (see "Data Sources," this report).

References: Anderson, J. G., Prince, J., Brune, J. N., and Simons, R. S., 1982, Strong-motion accelerograms, in Anderson, J. G., and Simons, R. S., eds., The Mexicali Valley earthquake of 9 June 1980: Research Institute Newsletter, v. 16, no. 3, p. 79-83. Porcella, R. L., and Matthiesen, R. B., 1979, Preliminary report on the U.S. Geological Survey October 15, 1979, Imperial Valley earthquake: Report 79-1654, 41 p. Turpen, C. D., 1980, Strong-motion records from the Mammoth Lakes earthquakes of May 1980: California Division of Mines and Geology Preliminary Report 27, 42 p. The accelerograph is attached to a

U.S. Geological Survey Open-File To reconfirm the validity

It is hoped that future recorunusual

accelerometers)

the By R. L. Porcella

One of the primary purposes of this program report is to disseminate periodically strong-motion information and data from the U.S. Geological Survey's National Network to the international earthquake engineering community. USGS strong-motion data is currently published triannually and includes the azimuth, duration, and amplitude of peak accelerations greater than 5 percent .9.; these amplitudes are scaled from the original records and are listed to the nearest one-hurdredth of a .9. (see table 1, for example). This peak-motion data has been used often in recent years in studies of the attenuation characteristics of horizontal ground acceleration for varying earthquake magnitudes, source-site distances, source mechanisms, and recording-site conditions (see for example, Tri funac and Brady, 1976; Hanks and Johnson, 1976; Boore and others 1978, 1980; Boore and Porcella, 1980; Campbell, 1981; Hanks and McGuire, 1981; and Joyner and Boore, 1981).

References: Boore, D. M., Joyner, W. B., Oliver, A. A., III, and Page, R. A., 1978, Estimation of ground motion parameters: U.S. Geological Survey

1980, Peak acceleration, velocity, and --displacement from strong-motion records:

Bulletin Seismological Society America, v.

70' p. 305-321. Boore, D. M., and Porcella, R. L., 1980, Peak acceleration from strong-motion records: g postscript: Bulletin of the Seismological Society of America, v. 70, p. 2295-2297. Campbell, K. W., 1981, Near-source attenuation of peak horizontal acceleration: Bulletin of the Seismological Society of America, v. 71, p. 2039-2070. Hanks, T. C., and Johnson, D. A., 1976, Geophysical assessment of peak accelerations:

Figure 2.- New Madrid Strong-Motion Network. Table 3.- Accelerograph stations in the New Madrid Strong-Motion Network

Station, Coordinates Structure Owner, I.D. no.

Arkabutla Dam, Miss. ACOE, 2444

Barkley Dam, Ky. ACOE, 2427

Blytheville, Ark. Fire Station #2 USGS, 2449

Cairo, Ill.' Fire Station USGS, 2451

Campbell, Mo. Fire Station USGS,2454

Cape Girardeau, Mo. SE Mo. State College USGS, 2403

Corning, Ark. Post Office USGS, 2455

Dexter, Mo. Fire Station #2 USGS, 2457

Dyersburg, Tenn. Fire Station #2 USGS, 2461

Gideon, Mo. City Hall USGS, 2456

Hayti, Mo. Medical Center USGS, 2448

Interstate 55 Rte P Bridge FHWY, 2477 34.76 N 90.12 W

37.02 N 88.22 W

35.928 N 89.926 W

36.494 N 90.075 w

37.316 N 89.529 W

36.41 N 90.58 w

36.796 N 89.966 w

36.05 N 89.39 w

36.454 N 89.919 w

36.237 N 89.740 w

36.66 N 89.67 w type, Size

earth dam, 3940x2l m hi. embankment

wood/brick, steel frame, 1-story bldg.

concrete block, ground steel frame, 1-story bldg.

concrete block, ground steel frame, 1-story bldg.

reinforced concrete, 2-story bldg.

concrete block, ground 1-story bldg.

pre-stressed concrete, 1-story bldg.

concrete block, ground steel frame, 1-story bldg.

concrete block, ground brick veneer, 1-story bldg.

reinf. cone., brick veneer, 3-story bldg.

reinf. cone., cone. piles, 64 m-long brdge recording Instrument location(s)

crest, abut., 1-14-75 downstream, spillway(2)

13 channel, remote Date installed geology

Quaternary alluv. deposits Table 3.- Accelerograph stations in the New Madrid Strong-Motion Network .:.. continued

Station, Coordinates Structure Owner, I.D. no.

Lepanto, Ark. Fire Station USGS, 2458

Marion, Ill. V.A. Hospital VA, 2411 Memphis, Tenn. V.A. Hospital VA, 2410 New Madrid, Mo. Noranda Plant USGS, 2420

Norfork Dam, Ark. ACOE, 2401

Obion, Tenn. Po 1i c e Dept • USGS, 2460 Paragould, Ark. Post Office USGS, 2459 Poplar Bluff, Mo. V.A. Hospital VA, 2409

Portageville, Mo. Post Office USGS, 2452

Rend Dam , I 11 . ACOE, 2422

St. Louis, Mo. Cochran Hospital VA, 2408 St. Louis, Mo. Jeff. Barracks Hosp. VA, 2407 35.613 N 90.330 w

37.72 N 88.95 w

35.14 N 90.03 w

36.51 N 89.57 w

36.25 N 92.23 w

36.259 N 89.192 w

36.06 N 90.49 w

36.77 N 90.42 w

36.428 N 89.704 w

38.02 N 88.99 w

38.64 N 90.23 w

38.49 N 90.28 w type, Size

concrete block, ground steel frm roof, level 1-story bldg.

8-stall garage, ground 1-story bldg.

concrete block, ground 1-story bldg.

concrete dam, 800x66 m hi.

concrete block, ground steel/tin roof, level 1-story bldg. concrete block, basement 1-story bldg.

reinf. cone., 6-story bldg.

cone. block, steel/tin roof, level 1-story bldg. earth dam, 3230x16 m hi. embankment 10-story bldg. basement

1-story bldg. Instrument location(s)

ground level Date installed geology

Quaternary a 11 uv. deposits

Quaternary a lluv. deposits Quaternary a lluv. deposits

alluv. deposits Tertiary sed. rock

Mississippian sed. rock Table 3.- Accelerograph stations in the New Madrid Strong-Motion Network - continued

Station, Coordinates Structure Owner, I. D. no.

Sardis Dam, Miss. ACOE, 2445

Sikeston, Mo. Fire Station USGS, 2453 Smith 1and Dam, Ill. ACOE, 2462

Tiptonville, Tenn. Reelfoot Lake USGS, 2446

Union City, Tenn. Fire Station USGS, 2450 Wappapello Dam, Mo. ACOE, 2415 34.41 N 89.80 w 36.883 N 89.580 w

36.37 N 89.41 w

36.426 N 89.061 w

36.93 N 90.27 w type, Size

earth dam, 4667x30 m hi.

cone. block, stl/conc. roof, level 1-story bldg.

earth dam, 830x34 m hi. embankment Instrument location(s)

of 1ocks ground level

crest, toe, spillway Date installed geology

Quaternary a lluv. deposits Mississippian sed. rock

Quaternary a 1l uv. deposits

Ordovician sed. rock Table 4.- Strong-motion data from the New Madrid seismic zone

June 13, 1975 2240 UTC S.E. Missouri 36.54N, 89.68W Magnitude 4.3

March 25, 1976 0041 UTC N.E. Arkansas 35.59N, 90.48W Magnitude 5.0

March 25, 1976 0100 UTC N. E. Arkansas 35.61N, 90.48W Magnitude 4.5

• Event information from Preliminary Determination of Epicenters, published by the U.S. Geological Survey. Name (Owner)

New Madrid, Mo. No rand a P1ant (USGS)

Arkabutla Dam, Miss. (ACOE)

Wappapello Dam, Mo. (ACOE)

Tiptonville, Tenn. Reelfoot Lake (USGS)

New Madrid, Mo. Noranda Plant (USGS)

Arkabutla Dam, Miss. (ACOE)

Note: Operational stations not triggered and their epicentral

Note: Crest and abutment stations not triggered. Coordinates

distances include Memphis, Tenn. (72 km), Poplar Bluff, Mo. (128 km), Sardis Dam, Miss. (144 km), and Wappapello Dam Spillway (144 km); non-triggering indicates acceleration less than 0.01 ~(triggering threshold). 36.51 N 89.57 w

34.76 N 90.12 w

36.93 N 90.27 w

36.37 N 89.41 w

36.51 N 89.57 w

.01 motion database presently available for the New Madrid seismic zone. These data have been processed and the raw digitized accelerograms, calculated ground accelerations, velocities, and displacements are available in Herrmann (1977).

Although the current database is inadequate, it is anticipated that a future earthquake (magnitude 5 1/2 or greater) in the Mississippi Embayment region will trigger most of the stations in the expanded New Madrid network and provide a significant and unique strong-motion data set for use in the investigation of the spectral characteristics and attenuation of ground motion and in seismological and earthquake hazards studies of the central United States.

References: Herrmann, R. B., 1977, Analysis of strong-motion data from the New Madrid seismic zone: 1975-1976: RANN Grant ENV 76-20875, St. Louis Univ., St. Louis, Mo. 63103, 144 p. Matthiesen, R. B., 1978, On the development of strong-motion instrument networks in the United States: Open-File Report 78-1024, 91 p. Porcella, R. L., 1978, Strong-motion instrumentation in the central and eastern United States: Earthquake Notes, v. 49, n. 2, p. 3-14. Stauder, W., Herrmann, R., Singh, S., Perry, R., Haug, E., and Morrissey, S., 1980, Central Mississippi Valley Earthquake Bulletin, St. Louis University, St. Louis, Mo. 63103, 44 p. Willden, R., and Carlson, J. E., 1968, Transcontinental geologic map from 87° to l00°W longitude: Miscellaneous Geologic Investigations Map I-534-C, scale 1:1,000,000.

SUMMARIES OF RECENT STRONG-

By Christopher Rojahn and J. D. Raggett

This report suggests guidelines for the strong-motion instrumentation of highway grade separation bridges. the civil or structural engineer who is not familiar with the objectives of strong-motion instrumentation programs, the instrumentation utilized in such programs, and where and how to install that instrumentation.

The report is divided into 10 principal sections. The first section is a general discussion on strong-motion instrumentation and records. instrumentation program objectives and criteria for selecting a bridge for stro~-motion instrumentation are introduced. National Science Foundation,

MOTION REPORTS*

It has been written for

In the second and third sections, (35°-390N),

The fourth section is a discussion on the linear dynamic behavior of bridges that is designed to familiarize the reader with the theoretical aspects of bridge response. section, the failure of highway bridges during the 1971 San Fernando earthquake is discussed, and in the sixth section, recommended guidelines for instrument placement on and adjacent to bridge structures are presented. seventh and eighth sections describe recommended instrumentation techniques, and maintenance requirements, and the ninth contains a complete description of an actual strong-motion instrumentation scheme installed on a continuous two-span bridge near El Centro, California. The last (tenth) section contains concluding remarks, followed by a list of references and an appendix containing a discussion on the positive and negative aspects of recording various quantities of motion.

This document was prepared by the U.S. Geological Survey for the Offices of Research and Development Administration, U.S. Department of Transportation (FHWA Purchase Order 5-3-0195); it is available to the public through the National Technical Information Service (NTIS; see "Data Sources," this report).

*Inclusion of strong-motion information sources is intended as a service to our readers and does not imply endorsement of these reports by the U.S. Geological Survey.

The National Science Foundation's Directorate for Engineering supports basic and applied research that improves our knowledge of fundamental engineering principles and provides the knowledge needed to advance engineering technology. strengthen our Nation's academic engineering base by its support of research at academic institutions, and through such activities as research equipment grants and special award programs for new investigators.

of the Federal Highway

National Science Foundation Directorate for Engineering Washington D.C. 20550

The Directorate also seeks to The programs of CEE include earthquake hazard mitigation research in many disciplines to develop an understanding of how earthquakes impact natural and manmade facilities in order to reduce casualties, damage, and social and economic disruption. subelements:

Design Research Aims to develop procedures for performing dynamic analysis of proposed or existing construction under earthquake loadings, to develop components subjected to damaging dynamic loads, and to develop procedures for the analysis and design of nonstructural and architectural systems subject to earthquake loadings. Siting Research Seeks to determine from instrumental data the nature of strong ground shaking during earthquakes, procedures to predict the spatial and temporal distribution of strong ground motion at different sites, to understand the dynamic behavior of soil and rocks subject understand the behavior of the ocean, particularly its margins, due to underwater earthquakes producing damaging tsunamis. Societal Response Research Studies and evaluates measures used to mitigate society's loss due to earthquake other (and includit'lg emergency preparedness, land use planning, building codes, insurance and other economic incentives, and information and education, so that communities can organize themselves to withstand disasters with minimal impact on life and property. Recent Awards in Engineering is a new publication. research awards made in each fiscal year quarter by the Directorate for Engineerin~ and is aimed at those researchers, educators, administrators, and users who wish to keep abreast of the research being supported in various technical areas.

To receive future issues of Recent Awards in Engineering, send name and address to National Science Foundation, Directorate of Engineering, cations, Washington, D.C. 20550.

By R. D. Borcherdt and R. B. Matthiesen Safeguarding life and property from the destructive effects of earthquakes is a major national as well as worldwide problem. Because the most widespread destructive effects of This program consists of three

It provides information on the

hazards)

for Communi-1800 G Street supports

NW, earthquakes are due to stro171g· shaking, either directly through shaking-induced structural damage, or indirectly through shaking-induced ground failures, effective programs to measure strong ground motions generated by earthquakes are vital to national as well as international efforts to reduce earthquake hazards. Strong-motion programs in the United States are supported by a number of Federal and State agencies with coordination provided by a national program operated by the u.s. Geological Survey and supported by the National Science Foundation. program is designed to collect, analyze, and disseminate structural-response and ground-motion data. process strong-motion data include the U.S. Geological Survey, the California Division of Mines and Geology, the Uni ve:tsity of Southern California, and Stanford University. Automatic digitization procedures and interactive software being developed at the centers permit rapid processing and dissemination of the data to interested researchers. The extreme importance of obtaining strong-motion data at distances less than 40 kms from large (M greater than 7) earthquakes provides an urgent need for international cooperative efforts to acquire and disseminate near-field strong-motion data.

Reference: Proceedings of the Seventh World

constitutes the proceedings of the workshop on Interpretation Records Obtained in and (or) near Buildings. The workshop was sponsored by the National Science Foundation and was held on April 1 and 2, 1980, at the San Francisco Airport Hilton. The main purpose of the workshop was to review existing building strong-motion instrumentation programs, to document existing procedures for processing and interpreting data from those programs, and to identify ways to improve data acquisition, techniques.

summary of the various components of existing building strong-motion earthquake instrumentation programs. data analysis, and design applications are discussed. Recommendations are proposed. Reference: Workshop proceedings, San Francisco, Conference September 8-13, 1980, Istanbul Turkey: v. 2, Part II, p. 9-16.

By Gary C. Hart, Christopher Rojahn,

The material contained in this report

This report presents a state-of-the-art

Calif., April 1-2, 1980: Structure Department, UCLA, Los Angeles, Calif. 90024, UCLA Report No. 8015, 137 p. Agencies developing centers to

Instrumentation location, The cooperative national

Mechanics and By A. G. Brady, P. N. Mark, V. Perez,

This report contains plots of the results of corrpleted processing performed on the six close-in strong-motion records obtained from the Coyote Lake earthquake of August 6, 1979. Additional copies may be obtained from the USGS Open-File Services Section or the California Division of Mines and Geology (see "Data Sources," this report). ponding to the plots of the analysis sections 1, 2, and 3 (uncorrected data, corrected data, and response spectra, respectively) may be obtained on magnetic tape from the EiJIS (see "Data Sources," this report).

Reference: U.S. Geological Survey Open-File

This report contains summaries of geologic and engineering data and information strong-motion stations in Berkeley (4), Oakland (2), Pleasant Hill, San Francisco (5), and San Pablo. The information is taken from published and unpublished sources on file with the Seismic Engineering Branch, U.S. Geological Survey, and includes station information, a location map, core data, lithologic logs, and a narrative of local or site geology.

Reference: U.S. Geological Survey Open-File

By James F. Gibbs, Thomas E. Fumal,

Studies conducted in the San Francisco Bay Region have shown that average shear-wave velocity can be readily tied to quantitative estimates of ground motion such as ground amplification and earthquake intensity. thermore, when certain physical properties of the geologic materials such as texture, hardness, and fracture spacing are observed during geologic mapping, a method can be used to predict shear-wave velocity from the descriptions a f geologic units. By measuring shear-wave velocities in key units together with the above data, regional maps depicting the earth-Report 81-42, 171 p. and California Division of Mines and Geology Preliminary Report 24.

Report 80-1140, 30 p. (see "Data Sources," this report).

and L. D. Porter

By B. L. Silverstein

and Edward F. Roth

STRONG-MOTION INFORMATION, DATA REPORTS,

furquake shaking hazard can be compiled.

The goals of the current program are to provide shear-wave data in the Los Angeles area to compare with that in the San Francisco Bay region where high-strain intensity data are available. rized in this report as part of a continuing project to seismically zone the Los Angeles area. Reference: U.S. Geological Survey Open-File

AND AVAILABILITY OF DIGITIZED DATA

enter yourname SMIRS Type the "enter" and "SMIRS" exactly as st10wn above, but replace "yourname" with your own name. The word "enter" is five low~rcase characters followed by one space; your name is typed as one continuous character string and followed by one space; and "SMIRS" is five uppercase characters. Type the carriage-return key and then the line-feed key; you w~ll be given instructions.

The strong-motion records from the February 9, 1971, San Fernando, California, earthquake and most of the significant records priur to that event have been digitized by the California Inc:;titute of Technology (CIT) (huason, Processing and analysis of the data have been presented in a series of reports containing (1) uncorrected digital data, (2) corrected accelerations, velocities, and di5~lace ments, (3) response spectra, and (4) r-ourier amplitude spectra. All of these data 1eports are available through the National Technical Information Service (NTIS, see "Data Suurces," this report). The digitized data from tne CIT digitization program are available from the Environmental Data and Information Service (EDIS) and the National Information Serv1ce for Earthquake Engineering at the Univerc:;ity of California, Sources," this report). digital data from subsequent years w1ll be available from EDIS and NISEE at approximately the same time as the data reports are published. Data from 27 locations are summa-

Report 80-378, 167 p. (see "Data Sources," this report).

A user's manual is

(NISEE, The magnetic tape The system is

"Data Refererces : Converse, April, 1978, Strong-motion information retrieval system user's manual: U.S. Geological Survey Open-File Report, 79-289, 51 p. Hudson, D. E. , 197 6, Strong-motion earthquake accelerograms - index volume: Institute of Technology, EERI report 76-02, 72 p.

Processed strong-motion data from selected earthquakes are available from the California Division of Mines and Geology. The data have been prepared by the interim CDMG strong-motion data processing system. composed of a series of programs that have been developed by the California Institute of Technology, the U.S. Geological Survey, and the California Division of Mines and Geology, with special emphasis on the handling of longduration film records from multiple-channel central recording instruments. The data are grouped by phase:

Phase I Phase II

Phase III Response spectra.

Each phase contains three-channel subgroups arranged by station. At the present time, data from the following earthquakes have been processed: Santa Barbara earthquake of August 13, 1978

UCSB Goleta UCSB North Hall Freitas Building 'Imperial Valley earthquake of October 15, 1979

El Centro free-field Imperial County Services Bldg. The data nine-track tapes, along with a microfiche copy of the tape contents. should contact the CDMG Office of Strong-Motion Studies (see "Data Sources," this report).

It is the policy of the CDMG to make all strong-motion record data promptly available to the public in a manner consistent with good data management. records, personal access to record or data files, and copies of data files should be made to the Chief, Office of Strong-Motion Studies (OSMS), and should specify identity and medium of materials to be provided or reviewed. Desired access or delivery dates should be Uncorrected accelerations, Corrected velocities, and displacements, are available

Requests for copies of This system

standard speci fie. materials or personal access to files is received, OSMS staff will provide the requested material or will set an appointment time for personal review of files; the requestor will be notified immediately of any signi fie ant delay or other problems that prevent meeting the request. processing of materials will be based on the actual cost of producing and delivering the items, originals and master copies of all items.

cooperation between the United States and the Central programs, much of the data from those programs are available from the same sources as the United States data (see below). about strong-motion data from the Western Hemisphere Strong-Motion operated by the USGS.

class copies of records from those foreign organizations comparable to those prepared by the USGS. Abstracts of the data reports from such organizations are presented in this Seismic Engineering Program Report series, and through informal arrangements, copies of the data and records are made available.

seismograms for dissemination to the scientific and engineering community is available from World Data Center A for Solid Earth Geophysics and the National Geophysical Terrestrial Data Center (NGSDC). contributing to the strong-motion data base include Australia, Italy, Japan, New Zealand, Rumania, U.S.S.R., and Yugoslavia. Geological Survey has furnished records from its network of cooperative strong-motion stations, including those in Central and South America.

able on 35-mm film, on 70-mm film chips, as paper copies, and as digitized data on punched cards or magnetic tape. A list of most records can be obtained from the World Data Center A publication "Catalog of Seismograms and Strong-Motion Records," Report SE-6. This catalog can be ordered from NGSDC (EDIS/NOAA) for $3.00 (see "Data Sources," this report).

Because of the long history of close

The USGS does not attempt to obtain first-

A worldwide collection of strong-motion

Copies of strong-motion records are avail-

The most significant strong-motion records When a request for copies of

The U.S. film chips· are available for $1.50 per chip; longer records are continued on additional chips. The 35-mm film copies can be purchased for $30 per reel, the complete set of reels for $180. There is a minimum charge of $10 per order.

Japan and Australia have supplied magnetic tapes of digitized data from stations locateo in the western Pacific Ocean (the Japanese Islands, New Guinea, and New Britain). series of 400 United States strong-motion records (1933-1971) were digitized by the California Institute of Technology and are now availa?le on six magnetic tapes. Geological Survey records from its network; they have generated 15 tapes of strong-motion records recorded from 1?67 to 1975 in the United States, Chile, Nicaragua, San Salvador, and Mexico.

Other digitized data include punched cards containing strong-motion records from the March 4, 1977, earthquake in Rumania (recorded in

1976, In Uzbek, U.S.S.R.; and three earthquakes in the New Madrid seismic zone (located in midcontinental United States) in 1975 and 1976.

Recent acquisitions include a magnetic tape of strong-motion records triggered by a swarm of earthquakes that occurred in northern Italy near the town of Friuli in 1976; these were compiled by the National Commission for Nuclear Energy and have been given to the center for distribution. obtained from California earthquakes near Santa Barbara in ~ugus~ 1978, Gilroy in August 1979, El Centro In October 1979, and Livermore in January 1980.

A table listing all digitized strong-motion records available on magnetic tape may be obtained free of charge from EDIS/NOAA. Digitized strong-motion records may be purchased either in punched card format at $60 per record (including all three instrument components) or in tape format at $80 per tape.

Checks or money orders should be made payable to "Commerce/NOAA/NGSDC"; should be addressed to EDIS/NOAA (see "Data Sources," this report).

Gazli earthquake of May 17,

Other data include A

The u.s.

inquiries strong-motion inquiries to the appropriate agency listed below:

1. Branch of Distribution
2. Earthquake Engineering
3. EDIS/NOAA
4. National Technical
5. NISEE/Computer Applications (415) 642-5113
6. Office of Strong-Motion
7. Open-File Services Section
8. Seismic Engineering Branch (415) 323-8111

604 So. Pickett Street Alexandria, VA 22304

Research Institute 2620 Telegraph Avenue Berkeley, CA 94704

National Geophysical and Solar-Terrestrial Data Center (D622) Boulder, CO 80303

Information Service 5285 Port Royal Road U.S. Dept. of Commerce Springfield, VA 22161

519 Davis Hall, UC Berkeley Berkeley, CA 94720.

Studies California Division of Mines and Geology 2811 "0" Street Sacramento, CA 95816

Box 25425, Federal Center Denver, CO 80225

345 Middlefield Road, MS 78 (FTS) 467-2881 Menlo Park, CA 94025.

DATA SOURCES

reports or information records and regarding data, address

(916) 322-3105 (FTS) 552-3105

(303) 234-5888 (FTS) 234-5888

ext 2881 Reference Error

CIT; EERL S-M earthquake accelerograms, digitized & plotted data; val II, III, IV; Part B; Record #037 (1966 Parkfield earthquake)

same as above: val I, II; Part C Record #041 (1971 San Fernando earthquake; Component direction-Pacoima Dam accelerogram) USGS S-M Station No. 1250 Gilroy, Gavilan College (Component direction - all S-M records from Oct. 1972 to Aug. 1979)

USGS S-M Station 2420 New Madrid, Missouri (Component directionevents of 6-13-75 and 3-24-76) USGS S-M Station no. 181; Los Angeles, 640 Marengo, 1st floor (Component direction prior to 7-15-70)

NOTE: Since 7-15-70, the 1st floor (also 4th floor and roof) component directions are:

USGS S-M Station No. 122; Glendale, California (Component direction - events of 4/8/68 and 2/9/71)

USGS S-M Station No. 125(828); Lake Hughes Array Station (1A) Component direction:

ERRATA

Temblor, Calif. No. 2 USGS Station No. 1097 35 45 07" N 120 15 52 w

L - S74W V - Down T - Sl6E

L - S67W V - Down

L - Sl9W V - Down T - S71E

L - N36W V - Down T - S54W

L - S70E V - Down T - S20W

L - N21E V - Down T - N69W

L - N21E v - Down T - S69E Temblor, Cal if. USGS Station No. 1438 35 42 36 N 120 10 I 12 W

L - N76W V - Down T - S14W

L - S67W V - Down T - S23E

L - West V - Down T - South

L - S54W V - Down T - S36E

L - N36W V - Down T - S54W

L - S72E V - Down T - Nl8E

L - S21W V - Down T - S69E

L - S21W V - Down T - S69E Event

7 August 1979- 24 August 1979 Central California Epicenters and magnitudes unknown 13 Apri 1 1980 0616 UTC Central California 36.72N, 121.55W Magnitude 4.9 14 September 1979- 5 May 1980 Central California Epicenter and magnitude unknown

25 May 1980- 28 May 1980 Central California Epicenters and magnitudes unknown

25 May 1980- 4 June 1980 Central California Epicenters and magnitudes unknown

See footnotes at end of table. Station name (owner)l

APEEL Array Sta. 2E Hayward (USGS)

Note: One additional record** recovered at APEEL station 2E. Bear Valley: Sta. 12 Williams Ranch (USGS)

Bear Valley: Sta. 1 Fire Station (USGS)

Note: May be related to central California earthquake of

New Melones Dam (ACOE)

Note: Two each additional records** recovered at the left and right

Hidden Dam (ACOE)

Control Tower (upper 1eve 1)

Note: Two additional records** recovered at upper level. Instrument

Fresno VA Hospital Basement (VA) Apri 1 13, 1980.

abutments, slope, and downstream stations.

at lower level malfunctioned.

Station coord.

37.66° N * 122.08° w

36.658° N 2.4 121.249° w

36.573° N * 121.184° w

37.949° N * 120.524° w

37.11° N * 119.88° w

Duration5 (s)

Central California Epicenters and magnitudes unknown

See footnotes at end of table. Station name (owner) 1

Dos Am igos Pumping plant (CDWR)

(ACOE)

Lower spill way gallery

Note: Two each additional records** recovered at crest, toe, and lower spillway gallery.

(ACOE)

Note: Two each additional records** recovered at crest and tower.

Lake Success Dam (ACOE)

Left abutment Right crest

Note: Nine each additional records** recovered at downstream, slope, left and right abutments, and left and right crests.

Station coord.

recovered at levels 1 and 4.

25 May 19<l0- 5 June 1980 -continued-

See footnotes at end of table. Station name (owner)

Buchanan Dam (ACOE)

Note: Three each additional records** recovered at right abutment

Terminus Dam (ACOE)

Note: Four each additional records** recovered from crest,

Pine Flat Dam (ACOE)

Tower - 2nd level

Tower - 5th 1evel

Downstream and lower tower; two each additional records** recovered at upper tower and crest.

downstream, and right abutment; two additional records** recovered from tower.

Three each additional records** recovered from tower (both levels) and downstream stations.

37.217° N * 119.983° w

36.41° N * 119.00° w

36.83° N * 119.33° w

255° Up 165° (_g)

18 September 1979- 6 June 1980 Central California Epicenters and magnitudes unknown

9 June 1980 0328 UTC No. Mexico 32.22N, 114.99W Magnitude 6. 1

See footnotes at end Station name (owner)l

Pleasant Valley Pumping plant (USGS)

Note: Three each additional records** recovered at switchyard, basement, first floor, and roof. Bonds Corner Highways 98 and 115 (USGS)

Calipatria Fire Stat ion (USGS)

Calexico Fire Station Fifth and Mary (USGS) El Centro Array 2 Keystone Road {USGS)

El Centro Array 10 Community Hospital (USGS) t

El Centro Array 11 McCabe School (USGS) Holtville Post 0\fice (USGS) E1 Centro Array 9 302 Commercial Ave. (USGS) t

of table. S-t2 DirectionS Max acc14 Duration Station coord.

36.31 o N. * 120.25° w

32.693° N 8.7 115.338° w

33.13° N * 115.52° w

32.669° N 8.9 115.492° w

32.916° N * 115.366° w

32.780° N 9.2 115.567° w

32.752° N * 115.594° w

32.812° N * 115.377° w

32.794° N * 115.549° w

o. 12

230° Up 140° (g)

9 June 1980 0328 UTC -continued-

7 March 1980- 23 June 1980 Central California Epicenter and magnitude unknown

19 August 1979- 24 June 1980 Central California Epicenter and magnitude unknown

27 July 1980 1852 UTC Maysville, Kentucky

38. l7N, 83.91W

24 August 1980 1241 UTC Central California

37. 57N, 121. 6 7W

See footnotes at end of table Station name (owner)l

Yuma, Arizona Strand Avenue (USBR/USGS)

Bear Valley: Sta. 9 Schroll Ranch (USGS)

Note: May be related to central California earthquake of

Gilroy Array Sta. 2 Mission Trails Motel (CDMG)

Gilroy Array Sta. 3 Sewage Plant (CDMG)

Note: May be related to central California earthquake of

Laurel River Dam Crest (ACOE)t

Nolin River Dam Center crest (ACOE)t

Livermore VA Hospital, (VA)t

Roof (7)

De l Va ll e 0am (CDWR)t

Toe Apr i l l 3 , l 980 .

April 13, 1980.

Bldg. 62 S-t2 Direction3 Max accl4 Duration5 Station coord.

32.73° N * 114.70° w

36.622° N * 121.276° W

36.982° N * 121.556° w

36.991° N * 121.536° w

36.961° N * 84.268° w

37.277° N * 86.247° w

37.625° N * 121.762° w

37.617° N 1.5 121.746° w 0.08 140° Up 050°

140° Up 050° **

Central California Epicenters and magnitudes unknown

1station owner code:

ACOE - U.S. Army Corps of Engineers. CDMG CDWR USBR USGS VA

S-wave arrival minus trigger time (S- t) interval.

• S-t time is questionable or cannot be determined.

Direction of case acceleration for upward trace deflection on accelerogram. Horizontal components are listed as azimuth in degrees clockwise from north. Vertical components are listed as "up" or "down."

4Peak acceleration recorded at ground level on one vertical and two horizontal orthogonal components unless otherwise noted. ** Denotes maximum acceleration is less than 0.05 ~at ground level or less than 0.10 ~at non ground-level stations.

Duration between first and last peaks of acceleration greater than U. lU ~· California Division of Mines and Geology. California Department of Water Resources. U.S. Bureau of Reclamation. U.S. Geological Survey. Veterans Administration. WWVB time code not legible or instrument not equipped with a correlation of accelerogram with event may be questionable. Station name (owner )1

San Franc i sea Bank of America Bldg. 122.40° w (USGS)

Basement (3rd)

Note: One each additional records** recovered at basement, concourse, 22nd, and 52nd floor. May be related to Livermore earthquakes of January 24 and 26, 1980. Direction3 Max accl4 Station coord.

radio receiver; Duration (_g)

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