Physics
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pepi...31..202r&link_type=abstract
Physics of the Earth and Planetary Interiors (ISSN 0031-9201), vol. 31, March 1983, p. 202-230.
Physics
103
Earthquakes, P Waves, Seismology, Alaska, Rupturing, Seismograms, Subduction (Geology), Wave Diffraction
Scientific paper
The variation of maximum earthquake size along the subduction zones has been interpreted as a variation in the seismic coupling ostensibly related to the mechanical conditions of the fault zone. Great differences are noted between the seismographs of the three great earthquakes whose rupture processes are presently considered: in the Kurile Islands (1963), The Rat Islands (1965) and Alaska (1964). On-scale long period P waves were recorded in all cases. Source time functions are deconvolved from the observed periods. It is concluded that maximum earthquake size is related to the asperity distribution on the fault. The subduction zones with the largest earthquakes have very large asperities, as in the Alaskan case, while the zones with the smaller great earthquakes, such as the Kurile Islands, have smaller scattered asperities.
Kanamori Hiroo
Ruff Larry
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