Attenuation of multiple ScS waves beneath the Japanese Arc

Details Attenuation of multiple ScS waves beneath the Japanese Arc Attenuation of multiple ScS waves beneath the Japanese Arc

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pepi...19..337n&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 19, Issue 4, p. 337-347.

Physics

4

Scientific paper

36 pairs of multiply-reflected ScS waves from deep earthquakes around Japan are analyzed to investigate the anelastic properties of the mantle on the continental and oceanic sides of the dipping slab. The average Q-value for shear waves passing through the mantle on the oceanic side is found to be 226 in the frequency range 10-40 mHz. This Q-value is in good agreement with the Q models SL8 (Anderson and Hart, 1978) and QBS (Sailor and Dziewonski, 1978) which have been derived from free oscillation data. Assuming that the Q-value for the mantle deeper than 400 km on the continental side of the Japanese Arc is the same as that for the model SL8, we obtain a value of Q = 53 in the upper mantle above the dipping slab beneath the Sea of Japan. Higher Q-values are obtained for the mantle behind the northern Izu-Bonin arc.

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