Accession Number : AD0864044

Title :   A Location and Travel-Time Study of Aleutian Islands Explosions and Earthquakes.

Descriptive Note : Seismic data lab. rept.,

Corporate Author : TELEDYNE INDUSTRIES INC ALEXANDRIA VA EARTH SCIENCES DIV

Personal Author(s) : Chiburis, E. F. ; Ahner, R. O.

Report Date : 15 DEC 1969

Pagination or Media Count : 34

Abstract : Travel-time anomalies from the LONG SHOT explosion on Amchitka Island are used to locate the Flexbag explosion approximately 70 km southwest of LONG SHOT. The results obtained using anomalies and various teleseismic networks indicate location errors less than about 10 km. Without anomalies, the location errors are 5-25 km. Comparable results are obtained when Flexbag anomalies are used to locate LONG SHOT. In addition to the location of the explosions, 52 Aleutian Islands earthquakes, previously located by the USC and GS, were relocated using LONG SHOT anomalies. That the anomalies are valid in the immediate area of LONG SHOT and useful over a larger area is illustrated by locating 25 of these earthquakes with an eight station common network both with and without LONG SHOT anomalies. The pattern of the resultant location shifts provides insight into the problems of location stability, network resolution, and location bias. (Author)

Descriptors :   (*SEISMOLOGICAL STATIONS, SEISMIC WAVES), (*UNDERWATER EXPLOSIONS, ALEUTIAN ISLANDS), (*NUCLEAR EXPLOSIONS, DETECTION), SEISMOMETERS, NETWORKS, EARTHQUAKES, EPICENTERS, ANOMALIES, SIMULATION.

Subject Categories : Seismology
      Seismic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE