Strong Quake, Sumbawa, Indonesia

A strong undersea earthquake struck off the coast of Sumbawa in the Flores Sea this morning.

Monday 9th November 2009

A magnitude 6.7 earthquake struck 15 km north-north-west of Raba, Sumbawa, Indonesia at 8:42 NZDT this morning. The undersea quake, which was centred 310 km east-north-east of Mataram, Lombok, Indonesia (330 km west of Ende, Flores, Indonesia) was 18 km deep.

The Pacific Tsunami Warning Centre, issued a bulletin for the event, which it reports at magnitude 6.9, advising that a widespread tsunami threat did not exist based on historical data. It noted that there was a very small possibility of a tsunami event that could affect coasts close to the epicentre.

Geoscience Australia reported the quake at magnitude 6.8 at a depth of 20 km. Their calculation appears to put the epicentre just onshore at Sumbawa. They expect that the quake would have caused damage within 80 km of the epicentre, and would have been felt up to 1,000 km away.

[Compiled from data supplied by the U.S. Geological Survey and its contributing agencies; the U.S. National Oceanic & Atmospheric Administration’s Pacific Tsunami Warning Centre, and Geoscience Australia.]

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