Magnitude 7.5 KEPULAUAN ALOR, INDONESIA
Thursday, November 11, 2004 at 21:26:41 UTC
Preliminary Earthquake Report
U.S. Geological Survey, National Earthquake Information Center
World Data Center for Seismology, Denver
The location and focal-mechanism of the earthquake are consistent with it
having occurred on the thrust-interface between the
Banda Sea micro-plate to the north and the Timor micro-plate to the south.
The Banda Sea micro-plate moves south toward, and thrusts beneath, the
Timor micro-plate with a velocity of about 30 mm/year. The two micro-plates
are sandwiched along with other micro-plates between the
larger Sunda, Philippine Sea, Australia, and Pacific plates.
In July 1991, a magnitude 6.9 earthquake struck 20 km to the west and
killed 23 people and injured 181.
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