High Gain Long Period Seismograph Station

Abstract

A High Gain Long Period (HGLP) seismograph station was installed in the White Pine Copper Mine in Ontonagan County, Michigan. The station went through a series of stages starting with a long period vertical recording through a phototube amplifier on a strip chart and ending as an essentially standard HGLP station. Because of the difficulties of servicing and recording without telemetry, the station was closed at the end of 1976. Much useful information regarding the engineering and installation of HGLP stations in mines was obtained. The station produced many months of useful long period data. Concurrently with the station installation two extensive research efforts in long period seismology were carried on. One developed a Rayleigh wave velocity model for ocean basins and the other applied long period P wave spectra to the determination of seismic moments.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1978
Accession Number
ADA054979

Entities

People

  • James T. Wilson

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Sensors

DTIC Thesaurus Topics

  • Geography
  • Group Velocity
  • Measurement
  • Noise Reduction
  • Observatories
  • Ocean Basins
  • Phase Velocity
  • Rayleigh Waves
  • Recording Systems
  • Ridges
  • Seismology
  • Standards
  • Surface Waves
  • Telemetry
  • Topography
  • United States
  • Wave Propagation

Readers

  • Aerospace Test and Evaluation
  • Seismology