Propagation of Lg Seismic Waves in the Soviet Union

Abstract

This report summarizes the data on the Lg phase, a seismic wave-train with periods between 0.5 and 6 sec transmitted in the continental crust with a group velocity of 3.44 to 3.57 km/sec, propagating in the Soviet Union and nearby areas. Amplitude-distance curves and amplitude-distance correction factor data used in determining the magnitudes of Lg are given. The available travel time data, including the standard travel times of Lg, are summarized. Analysis of the efficiency of propagation of Lg by Soviet seismologists shows that Lg propagates efficiently across the Indian shield, Tarim basin, and the Russian, Siberian, and Kazakh platforms. It propagates less efficiently along Tien Shan and the Himalayas. The Tibetan platform, central part of the Black Sea, and central and eastern parts of the Caspian Sea completely eliminate Lg. 62 pp.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1979
Accession Number
ADA072844

Entities

People

  • Charles Shishkevish

Organizations

  • RAND Corporation

Tags

DTIC Thesaurus Topics

  • Asia
  • Black Sea
  • Caspian Sea
  • Central Asia
  • Earthquakes
  • Explosions
  • Frequency
  • Frequency Bands
  • Group Velocity
  • Nuclear Explosions
  • Secondary Waves
  • Seismic Waves
  • Standards
  • Surface Waves
  • Travel Time
  • Ussr
  • Wave Propagation

Readers

  • Seismology