Oceanic Pn/Sn Phases: A Qualitative Explanation and Reinterpretation of the T-Phase.

Abstract

The combined effects of: (1) differing efficiencies between Pn and Sn energy transmission across the basement-sediment interface; (2) ocean surface reflections; (3) Pn to Sn conversions; and, (4) large lateral variations in the crust and upper mantle are used to formulate a working hypothesis which appears to explain, qualitatively, many observations of high-frequency Pn/Sn phases throughout the western, northern, and central Pacific. Also, the concept of Pn/Sn phases as sources of energy at the basement-sediment interface is suggested as a possible mechanism for T-phase generation through scattering or Stoneley wave generation. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1982
Accession Number
ADA128343

Entities

People

  • Daniel A. Walker

Tags

DTIC Thesaurus Topics

  • Basements
  • Contracts
  • Conversion
  • Demographic Cohorts
  • Frequency
  • Geophysics
  • Islands
  • Marine Geophysics
  • Military Research
  • Nuclear Explosions
  • Observation
  • Oceans
  • Reflection
  • Ridges
  • Scattering
  • Seabed
  • Sediments

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Chemistry (specifically Chemical Fluorescence)
  • Theoretical Analysis.