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Virgilio Perez

Publications and source records attributed to Virgilio Perez.

7 recordsLinked to original sources
USGS1978

Strong-motion earthquake accelerograms digitization and analysis

This is the third of a series of reports planned to include the results of digitization and routine analyses of strong-motion earthquake accelerograms published by the U.S. Geological Survey. Serving as a model for this effort is the collection of data reports published by the Earthquake Engineering Research Laboratory of the California Institute of Technology during the years 1969 - 1975 and covering the significant records of the period from 133 up to the San Fernando earthquake of February 9, 1971. Earlier reports in the present series have covered the significant records of 1971 subsequent to San Fernando (Open file report No. 76-609) and Peru records from 1951 to 1974 (Open file report No. 77-587). The present report includes a selection of 1972 records.

Open-File Report↗
USGS1977

Strong-motion earthquake accelerograms digitization and analysis records from Lima, Peru, 1951 to 1974

This is the second of a series of reports planned to include the results of digitization and routine analyses of strong-motion earthquake accelerograms published by the U.S. Geological Survey. Serving as a model for this effort is the collection of data reports published by the Earthquake Engineering Research Laboratory of the California Institute of Technology during the years 1969 - 1975 and covering the significant records of the period from 1933 up to the San Fernando earthquake of February 9, 1971. The first of the present series of reports, Open File Report No. 76-609, covered the significant records of 1971 subsequent to the San Fernando earthquake. The present report includes the results of some ongoing work on Peru records.

Open-File Report↗
USGS1974

Time-dependent spectral analysis of thirty-one strong-motion earthquake records

Velocity response spectral analysis as a function of time for 5 percent critical damping is presented for the horizontal components of thirty-one earthquake records (61 components). A nomograph that allows conversion of the velocity response envelope to a displacement response envelope and a pseudo-absolute acceleration response envelope spectrum is also presented. Included among the records analyzed are such important accelerograms as those from El Centro, 1940, Olympia, 1949, Taft, 1952, San Francisco, 1957, Park-field, 1966, San Fernando, 1971 and Managua, 1972. Time-duration spectra showing the number of cycles for a particular period of the response envelope above different levels are presented. The effects of peak ground acceleration on the response envelope are examined.

Open-File Report↗