Study of teleseismic P II - amplitude data

Details Study of teleseismic P II - amplitude data Study of teleseismic P II - amplitude data

Dec 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970pepi....4...24e&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 4, Issue 1, p. 24-31.

Physics

15

Scientific paper

A study of recorded amplitudes of P for the same suite of events studied in part I indicates several step-wise changes in amplitude as a function of distance as reported by Gutenberg. They appear to be correlated with the near-discontinuities in slope of the P travel-time curve. It is suggested that Gutenberg may have miscalibrated near and far teleseismic portions of the amplitude versus distance curve. It is shown that the P amplitudes for long distance teleseismic signals are lower in Western United States (WUS) than in Eastern United States (EUS) by a factor of 3, implying high dissipation of P energy in the upper mantle or crust under WUS.

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