Combinations of Strain and Pendulum Seismographs to Enhance Long Period P and Rayleigh Waves at Queen Creek, Arizona

Abstract

Analog analysis techniques have been applied to the long-period (peak response at 25 seconds period) strain and pendulum system at QCAZ (Queen Creek, Arizona). The purpose is to determine the effectiveness period P wave and Rayleigh wave signals from earthquakes. The long-period pendulum instruments at QCAZ are used as a standard for comparison. Outputs of the strain and pendulum seismographs are combined using an analog computer. The resultant output is then compared for a sample of forty-four earthquakes to the appropriate pendulum to establish signal-to-noise ratio gain (or loss). The lack of reduction of the rms noise amplitude is principally a result of strain system noise at periods greater than 16 seconds.

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Document Details

Document Type
Technical Report
Publication Date
Mar 09, 1972
Accession Number
AD0743077

Entities

People

  • J. R. Woolson

Organizations

  • Teledyne Technologies

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Amplitude
  • Analog Computers
  • Calibration
  • Contracts
  • Earthquakes
  • Filters
  • Measuring Instruments
  • Microseisms
  • Phase Shift
  • Phase Velocity
  • Rayleigh Waves
  • Standards
  • Surface Waves
  • Transducers
  • Virginia
  • Visual Inspection
  • Waves

Readers

  • Geodesy
  • Seismology