Accession Number:

AD0856110

Title:

Effects of Radiation Patterns on Spectra and Magnitude Estimates.

Descriptive Note:

Seismic data lab. rept.,

Corporate Author:

TELEDYNE INDUSTRIES INC ALEXANDRIA VA EARTH SCIENCES DIV

Personal Author(s):

• Von Seggern, D. H.

Report Date:

1969-05-28

Pagination or Media Count:

33.0

Abstract:

According to surface-wave radiation pattern theory, amplitude at any given period is a function of azimuth for a given tectonic source at a given depth. Also the shape of the observed spectra is dependent upon azimuth as well as depth and source type. For a source with a constant magnitude force system, a uniform far-field measurement of its strength, namely Ms, can vary by up to one unit of magnitude depending on angles of dip and slip. Body-wave radiation pattern theory predicts that amplitude will be dependent on take-off angle as well as azimuth. Author

Descriptors:

• (*EARTHQUAKES
• SEISMIC WAVES)
• POWER SPECTRA
• SOURCES
• RAYLEIGH WAVES
• ATTENUATION
• MATHEMATICAL ANALYSIS
• COMPUTER PROGRAMMING
• AZIMUTH
• FAULTS(GEOLOGY)
• EARTH MODELS
• MOTION
• INTENSITY

Subject Categories:

• Seismology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE