Of the May 7, 1986 Adreanof Islands earthquake source parameters

Details Of the May 7, 1986 Adreanof Islands earthquake source parameters Of the May 7, 1986 Adreanof Islands earthquake source parameters

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13.1426h&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, Dec. 1986, p. 1426-1429.

Other

20

Aleutian Islands (Us), Earthquakes, Geodynamics, Plates (Tectonics), Seismic Waves, P Waves, Pacific Ocean, Surface Waves

Scientific paper

Source characteristics of the May 7, 1986 Andreanof Islands earthquake are studied based on previous data, and the aftershock region is found to consist of two strong asperities, one associated with the 1986 epicenter and the other with the epicenter of the 1957 Great Aleutian earthquake. First motions determine one steeply dipping nodal plane, and the second nodal plane is found to be dip 18 deg, rake 116 deg, and strike 257 deg, consistent with plate motions in this region. The seismic moment from the surface-wave inversion is 1.3 x 10 to the 28 dyne-cm, corresponding to M(w) = 8.0. The source time function is found to consist of four moment-releasing episodes which have a total moment release of 9.4 x 10 to the 27 dyne-cm.

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