Accession Number : ADA325727

Title :   Statistical Inversion of Seismic and Heat Flow Data.

Descriptive Note : Final rept. 30 Sep 92-30 Sep 96,

Corporate Author : CALIFORNIA UNIV BERKELEY

Personal Author(s) : Jeanloz, Raymond

PDF Url : ADA325727

Report Date : FEB 1997

Pagination or Media Count : 11

Abstract : Novel methods of characterizing heterogeneity inside the earth have been developed based on the theoretical study of wave propagation through complex media. Multiply scattered waveforms, for example from the 'coda' regions of seismic records, can be used to characterize statistical properties of the heterogeneity. The approach used can accommodate strong multiple scattering, such that one is enabled to investigate the conditions under which the heterogeneity is so important that effectively no energy is transmitted forward by the seismic waves. Similar theoretical methods can be utilized to investigate diffusive processes through heterogeneous media, such as heat flow through the earth's crust. The seismological application is being tested on detailed measurements obtained from the KTB (the German very deep) borehole, with initial results appearing to be most promising.

Descriptors :   *HEAT TRANSFER, *SEISMIC WAVES, *HETEROGENEITY, *INVERSION, SCATTERING, WAVEFORMS, STATISTICS, BOREHOLES, WAVE PROPAGATION, EARTH CRUST, GEOPHYSICS, DIFFUSIVITY, SEISMOLOGY.

Subject Categories : Geology, Geochemistry and Mineralogy
      Seismology
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE