DEVELOPMENT OF A THREE-AXIS LONG-PERIOD SEISMOGRAPH

Abstract

Three-axis, long-period, compact (borehole) seismometer system utilizing feedback-controlled seismic transducers based on magnetic suspension principle was developed, constructed and tested. The system includes digital tape recording and data processing. The overall system response is flat to 3db over a pass band from .02 to .07 Hz and the dynamic range is 60db. Results of tests show that surface waves from teleseismic events of m sub b less than or equal to 5 are consistently recorded. Horizontal components of surface waves from earthquakes in the Gulf of California region have been observed at the Ogdensburg, New Jersey test site.

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Document Details

Document Type
Technical Report
Publication Date
Feb 16, 1970
Accession Number
AD0702794

Entities

People

  • Ivan Simon

Organizations

  • Arthur D. Little

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Bandwidth
  • Barometric Pressure
  • Detection
  • Detectors
  • Frequency
  • Frequency Bands
  • High Gain
  • Measurement
  • New Jersey
  • Optical Detectors
  • Power Spectra
  • Recording Systems
  • Seismographs
  • Seismological Stations
  • Surface Waves
  • Tape Recording
  • Transducers

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Robotics and Automation.
  • Seismology