Processed CSMIP Strong-Motion Records from the Landers, California Earthquake of June 28 1992: Release No. 5

OSMS 94-13

by R. Darragh, T. Cao and A. Shakal

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The processed records obtained from 26 California Strong Motion Instrumentation Program (CSMIP) ground-response stations during the Landers earthquake of June 28, 1992 are included in this fifth processed data release. The epicentral distance of these 26 stations ranges from 43 to 186 km. Processed data from a total of 49 CSMIP ground-response stations have been released. Results from the first 23 ground-response stations are included in several processed data reports (CSMIP, 1992; Darragh and others, 1992; Darragh and others, 1993a-b).

Strong-motion records were recovered from 144 stations of the CSMIP following the Landers earthquake. The recovered accelerograms include 88 ground-response stations and 56 extensively-instrumented structures. The accelerograms, information on the earthquake and recordinq stations are - presented in the CSMIP data report on this-earthquake (Shakal and others, 1992). Details on accelerogram digitizing and processing will be presented in a final CSMIP processed data-report.

Digitization and processing of the records recovered by CSMIP started after the data report was completed and is continuing. The preliminary results of digitizing and processing for the first release of 6 records were announced on October 9, 1992, and were included in the first release report (CSMIP, 1992). The second release of 8 stations, including 6 ground-response and 2 instrumented buildings, were announced on December 4, 1992, and were included in the second release report (Darragh, and others 1992). The third release of 10 ground-response stations were announced on February 11, 1993, and were included in the third release report (Darragh and others, 1993a). The fourth release of 2 stations, San Bernardino - I10/215 Interchange and San Bernardino - E & Hospitality, were announced on September 30, 1993, and were included in the fourth release report (Darragh and others, 1993b). In addition, the processed records are available from several additional CSMIP-instrumented buildings.