Accession Number : AD0623106

Title :   STRUCTURE OF THE UPPER PART OF THE EARTH'S MANTLE FROM OBSERVATIONS OF EARTHQUAKES WITH INTERMEDIATE DEPTHS OF FOCUS,

Corporate Author : LIBRARY OF CONGRESS WASHINGTON D C AEROSPACE TECHNOLOGY DIV

Personal Author(s) : Lukk,A. A. ; Nersesov,I. L.

Report Date : 19 OCT 1965

Pagination or Media Count : 9

Abstract : A study of the earth's mantle was conducted on the basis of earthquakes occurring in the Pamir-Hindu Kush epicentral zone. In order to improve the accuracy of the determinations of the geometric coordinates of the foci, five temporary seismic stations were set up in the immediate epicentral zone. Elastic vibrations were registered on a profile of stations passing through Central Asia, eastern Kazakhstan, and the Altay and Sayan Mountains to the Lena River. The average distance between stations was 70--100 km. The total length of the profile was 3500 km. Earthquake epicenters were determined by the K-epicentral method , which does not depend on knowledge of the velocity profile of the medium or the depth of the focus, and is in essence a somewhat modified theoretical travel-time method.

Descriptors :   (*SEISMOLOGY, LITHOSPHERE), (*LITHOSPHERE, SEISMOLOGY), (*EARTHQUAKES, ASIA), SEISMIC WAVES, STRUCTURAL GEOLOGY, USSR

Distribution Statement : APPROVED FOR PUBLIC RELEASE