Moho depth variation in the central part of northeastern Japan estimated from reflected and converted waves

Details Moho depth variation in the central part of northeastern Japan estimated from reflected and converted waves Moho depth variation in the central part of northeastern Japan estimated from reflected and converted waves

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002pepi..130...31n&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 130, Issue 1-2, p. 31-47.

Physics

18

Scientific paper

We detected reflected P- and S-waves at the Moho in seismograms of shallow crustal earthquakes in the central part of northeastern (NE) Japan. P-to-S and S-to-P mode-converted waves at the Moho are also detected in seismograms of intermediate-depth earthquakes in the subducted Pacific slab. The depth distribution of the Moho in the central part of NE Japan is estimated by using travel time differences between these later phases and the first P and S arrivals. We collected travel time data of 496 reflected waves from 67 shallow earthquakes and 200 converted waves from 65 intermediate-depth earthquakes. The depth to the Moho estimated is deep beneath the land and becomes shallower toward the eastern and western coastlines. The Moho depth is about 34km in the middle of the land area, about 30km under the coastline of the Japan Sea and 27-29km under the coastline of the Pacific Ocean.

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