Detection Capability of the Kongsberg HGLP-System
Interim scientific rept. no. 3, 1 Apr 1972-31 Mar 1975
BERGEN UNIV (NORWAY) SEISMOLOGICAL OBSERVATORY
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The surface wave detection capability of the Kongsberg HGLP-system has been investigated for some areas. The detection capability varies strongly from one region to another. The detection threshold for events in Central Asia is on the average at least 0.5 m sub b units higher than for events in Iran- Afghanistan area at about the same epicentral distance. For explosions in the Kazakh area body wave magnitude 5 is required to excite surface wave trains visible at Kongsberg. A phase change of pi has been found between the Rayleigh wave trains from two presumed underground nuclear explosions in Eastern Kazakh. The Love wave recordings from the same explosions showed unexpectedly large amplitude difference.