Determination of Seismic Source Parameters from Long-Period Teleseismic Waves

Abstract

Spectral-fitting procedures are applied to teleseismic surface wave data for determining seismic source parameters, especially depth. From an examination of theoretical Rayleigh and Love wave spectra as a function of source structure, significant variation of the spectra can result from differences of gross tectonic structure in most cases. For very shallow events (less than 5 km), though, the effect of source structure is minimal. Seven Eurasian events are analyzed for source mechanisms. For those with known depth from bodywave phases, knowledge of the source region crustal structure is crucial to obtain focal depth agreement from spectral fitting. These source structures were then applied to events in the same region with no independent depth estimate.

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1974
Accession Number
AD0784898

Entities

People

  • David G. Black
  • David Sun
  • Lawrence S. Turnbull

Organizations

  • Texas Instruments

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Agreements
  • Central Asia
  • Detection
  • Earth Models
  • Far Field
  • Filter Analysis
  • Filters
  • Frequency
  • Love Waves
  • Narrowband
  • Plastic Explosives
  • Power Spectra
  • Radiation Patterns
  • Rayleigh Waves
  • Seismometers
  • Shallow Depth
  • Surface Waves

Readers

  • Seismology