Accession Number : AD0706872

Title :   RESEARCH IN SEISMOLOGY.

Descriptive Note : Annual rept. 1 Nov 68-31 Oct 69,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF EARTH AND PLANETARY SCIENCES

Personal Author(s) : Press,Frank ; Toksoz,M. Nafi ; Aki,K.

Report Date : 08 APR 1970

Pagination or Media Count : 472

Abstract : Seismic research projects supported by the contract are summarized under three broad categories: The structure and some properties of the earth's mantle and deep interior are investigated using arrays and dt/d(delta) measurements, dense net of stations in North America, as well as seismic surface waves and free oscillations. Body and surface wave propagation in media with irregular interfaces is studied using numerical techniques. Magnitude discrepancies, focal depths, mechanisms and statistics of earthquake occurrences are discussed. (Author)

Descriptors :   (*EARTH(PLANET), SEISMOLOGY), (*SEISMOLOGY, *REPORTS), STRUCTURAL GEOLOGY, NETWORKS, SEISMOLOGICAL STATIONS, SEISMIC WAVES, LITHOSPHERE, SOURCES, STATISTICAL ANALYSIS, ANOMALIES

Subject Categories : Geology, Geochemistry and Mineralogy
      Seismology

Distribution Statement : APPROVED FOR PUBLIC RELEASE