FIELD STUDY OF VARIATION IN CHARACTERISTICS OF SEISMIC NOISE AND SIGNALS WITH GEOLOGIC AND GEOGRAPHIC ENVIRONMENT
Semianual progress rept. 1 Jul-31 Dec 1961
UNITED ELECTRODYNAMICS INC PASADENA CA
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The method of establishing noise levels and relative signal response of the various sites occupied 10 in California consists of using two essentially identical tripartite seismic recording systems, one fixed and one which is relocated about once a month. The fixed station is the master and the relocated station is the slave. The triangular array of short period seismometers at the slave station is expanded at one week intervals from 14 mile from a central point by 14 mile intervals to a total central distance of one mile. The results are simultaneously recorded on film and magnetic tape and brought to an analysis office for processing.