Accession Number : AD0780088

Title :   Analysis of Coda and Multipath Propagation of Rayleigh Waves at NORSAR.

Descriptive Note : Scientific rept.,

Corporate Author : ROYAL NORWEGIAN COUNCIL FOR SCIENTIFIC AND INDUSTRIAL RESEARCH KJELLER

Personal Author(s) : Bungum,H. ; Capon,J.

Report Date : 03 JAN 1974

Pagination or Media Count : 62

Abstract : Frequency-wavenumber analysis of coda of 40 and 20 sec Rayleigh waves recorded at NORSAR shows that 40 sec period coda drops off faster vs. time while the resolving power of the array is better at 20 sec. Multipath arrivals with as much as 40-60 degrees are frequently identified, and travel path solutions for some events are proposed. As an example, 20 sec Rayleigh waves from a nuclear explosion are identified in the presence of an interfering event.

Descriptors :   *Seismic detection, *Underground explosions, Seismological stations, Norway, Seismic arrays, Seismometers, Earthquakes, Nuclear explosions, Identification, Multipath transmission, Rayleigh waves, Power spectra

Subject Categories : Seismology
      Seismic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE