FIELD STUDY OF VARIATION IN CHARACTERISTICS OF SEISMIC NOISE AND SIGNALS WITH GEOLOGIC AND GEOGRAPHIC ENVIRONMENT

Abstract

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 1/4 mile from a central point by 1/4 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.

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Document Details

Document Type
Technical Report
Publication Date
Mar 12, 1962
Accession Number
AD0274080

Entities

People

  • J. R. Woolson

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • California
  • Columbia River
  • Contracts
  • Earth Sciences
  • Electron Tubes
  • Frequency
  • Frequency Bands
  • Geology
  • Geophysics
  • Materials
  • North America
  • Oscillators
  • Recording Systems
  • Ridges
  • Topography
  • United States
  • Wave Analyzers

Readers

  • Military History of the United States in the 20th Century.
  • Radar Systems Engineering.
  • Seismology