RESEARCH IN SEISMOLOGY

Abstract

The velocity structure in the earth's mantle is determined using the travel times and travel-time slopes of P-waves recorded at LASA. The results show anomalous velocity gradients at depths of 700, 1200, and 1900 km. Both surface wave dispersion data and dt/d delta data show the presence of lateral heterogeneities in the upper and lower mantle. Theoretical studies of acoustic and gravity wave propagation in the atmosphere-ocean systems, affected of aftershocks on free oscillations, and response of layered spherical earth to point sources have been described.

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Document Details

Document Type
Technical Report
Publication Date
Oct 31, 1966
Accession Number
AD0643966

Entities

People

  • Frank Press
  • M. Nafi Toksöz

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Contracts
  • Detection
  • Dispersions
  • Explosions
  • Frequency
  • Frequency Shift
  • Geophysics
  • Gravity Waves
  • Group Velocity
  • Love Waves
  • Measurement
  • Phase Velocity
  • Physical Properties
  • Seismology
  • Surface Waves
  • Wave Propagation

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Seismology