Accession Number : ADA111903

Title :   Research into Surface Wave Phenomena in Sedimentary Basins.

Descriptive Note : Final rept. 1 Oct 80-30 Sep 81,


Personal Author(s) : Wojcik,G L ; Isenberg,J ; Ma,F ; Richardson,E

Full Text :

Report Date : 31 Dec 1981

Pagination or Media Count : 108

Abstract : This study is a continuation of an engineering seismology research effort prompted by the sensitivity of guidance sets in Minuteman Wing V to distant earthquakes. An earlier report considers the probable cause of anomalous patterns of seismic alarms triggered by two North American earthquakes. This report extends the previous study by examining the propagation of surface waves from the 1975 Pocatello Valley, Idaho earthquake sequence across Wyoming to Wing V. In addition, the more general question of surface wave phenomena in sedimentary basins is addressed, particularly the effect of laterally inhomogeneous (dipping) basin-bedrock interfaces. Findings indicate that fundamental and first overtone surface waves are significantly modified by the travel path. In contrast, higher modes are relatively unchanged by the travel path, and affect Wing V in much the same way as body waves considered in the previous study. (Author)

Descriptors :   *Seismic waves , *Sediments , Surface waves , Wave propagation , Basins(Geographic) , Paths , Prismatic bodies , Ray tracing , Elastic waves , Interfaces , Rock , Idaho , Earthquakes

Subject Categories : Seismology
      Guided Missile Launching and Basing Support

Distribution Statement : APPROVED FOR PUBLIC RELEASE