Near-Field Observations and Source Parameters of Central California Earthquakes

reportActive / Technical Report | Accession Number: AD0778458 | Open PDF

Abstract:

In 1966-67 the San Andreas Geophysical Observatory SAGO was established on the San Andreas fault zone in central California some 5 miles south of Hollister. This study is an investigation of near-field radiation from local earthquakes recorded on broadband seismometer systems at SAGO. From the library of events preserved on magnetic tape, 13 earthquakes were selected with a magnitude range of 2.4 to 5.1, an epicentral distance range of 2 to 40 km, and a variety of apparent source geometries relative to the main throughgoing San Andreas fault trace. The data set samples a range of magnitudes at a given distance for one type of comparison and a range of distances at a given magnitude for another.

Author(s):
Johnson, Lane R. ; Mcevilly, Thomas V.
Author Organization(s):
CALIFORNIA UNIV BERKELEY DEPT OF GEOLOGY AND GEOPHYSICS
Supplementary Note:
Sponsored in part by DARPA
Pagination:
0066

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AFOSR-TR-74-0635
Contract/Grant Number(s):
AF-AFOSR-2392-72, ARPA ORDER-1827-7
Monitor Series:
TR-74-0635, AFOSR
 Subject Terms
Joint Capability Areas:
JCA_6.3.3_Spectrum Management; JCA_6_Net Centric; JCA_6.3_Net Management; JCA_1_Force Support; JCA_1.2_Force Preparation; JCA_5_Command and Control; JCA_5.3_Planning; JCA_6.1_Information Transport; JCA_3.2_Engagement; JCA_3_Force Application; JCA_1.2.3_Educating; JCA_1.3_Human Capital Management; JCA_3.2.1_Kinetic Means; JCA_1.3.2_Personnel Management
Modernization Areas:
AI and Machine Learning
Communities of Interest:
Air Platforms
Descriptor(s):
*EARTHQUAKES, *SEISMOLOGY, CALIFORNIA, FREQUENCY, NEAR FIELD, SEISMIC WAVES, SOURCES
Field(s)/Group(s):
Seismology
Keyword(s):
SAN ANDREAS FAULT, CALAVERAS FAULT
Report Date:
1973 Dec 01