Monday, March 28, 2005

2005 Sumatra earthquake

The 2005 Sumatra earthquake, referred to as the Nias Earthquake by the scientific community, was a major earthquake on 28 March 2005, located off the west coast of northern Sumatra, Indonesia. Approximately 1300 people were killed by the earthquake, mostly on the island of Nias. The event caused panic in the region, which had previously been devastated by the massive tsunami triggered by the 2004 Indian Ocean earthquake, but this earthquake generated a relatively small tsunami that caused limited damage. It was the third most powerful earthquake since 1965 in Indonesia.

The earthquake occurred at 16:09:36 UTC (23:09:36 local time) on 28 March 2005. The hypocenter was located at 2°04′35″N 97°00′58″E, 30 kilometres (19 mi) below the surface of the Indian Ocean, where subduction is forcing the Indo-Australian Plate to the south-west under the Eurasian plate's Sunda edge. The area is 200 kilometres (120 mi) west of Sibolga, Sumatra, or 1,400 kilometres (870 mi) northwest of Jakarta, approximately halfway between the islands of Nias and Simeulue. Seismic recordings give the earthquake a moment magnitude of about 8.6 and effects were felt as far away as Bangkok, Thailand; over 1,000 kilometres (620 mi) away.

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