Accession Number : ADA241938


Title :   Studies of High-Frequency Seismic Wave Propagation.


Descriptive Note : Final rept. 17 oct 88-17 May 91,


Corporate Author : CALIFORNIA UNIV SAN DIEGO LA JOLLA


Personal Author(s) : Minster, Jean-Bernard ; Berger, Jonathan


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a241938.pdf


Report Date : 29 Mar 1991


Pagination or Media Count : 197


Abstract : This final report results are: (1) A study of the location of regional seismic events using a sparse network, with an application to eastern Kazakhstan. (2) An analysis of high frequency seismic observations collected in eastern Kazakhstan, including in particular calibration chemical explosions. (3) A study of the discrimination of quarry blasts from single explosions, using sonogram analysis of data collected in eastern Kazakhstan. (4) The extension of the discrimination methodology developed in the previous paper to small aperture array data, and application to the automated discrimination between earthquake and quarry blasts at NORESS. (5) The use of a new technique, labelled beam stack imaging, to map shallow crust scatterers near a small aperture array, with applications to NORESS. (6) A study of the polarization characteristics of high- frequency borehole seismograms recorded near Anza, California. (7) An analysis of attenuation and site effects on high-frequency seismic waves, using high- frequency borehole seismograms recorded in the San Jacinto fault zone, near Anza, California.


Descriptors :   *METHODOLOGY , POLARIZATION , HIGH FREQUENCY , AUTOMATION , NETWORKS , SITES , REPORTS , EXPLOSIONS , SEISMIC DETECTION , BOREHOLES , SEISMIC DATA , WAVE PROPAGATION , CHEMICAL REACTIONS , IMAGES , SEISMIC WAVES , ATTENUATION , MAPS , CALIFORNIA , CALIBRATION , DISCRIMINATION , EARTHQUAKES , NORWAY , ANTENNA ARRAYS , STACKING , SEISMOLOGY , ANTENNA APERTURES , LABELED SUBSTANCES , SEISMIC ARRAYS , SHALLOW DEPTH , SCATTERING


Subject Categories : Seismology


Distribution Statement : APPROVED FOR PUBLIC RELEASE