Earthquake News

14 years since a Magnitude 8.4 Earthquake hit Sumatra Indonesia


The September 2007 Sumatra earthquakes were a series of megathrust earthquakes that struck the Sunda Trench off the coast of SumatraIndonesia, with three of magnitude 7 or greater. A series of tsunami bulletins was issued for the area. The most powerful of the series had a magnitude of 8.4, which makes it in the top 20 of the largest earthquakes ever recorded on a seismograph


The tremors of the 8.4 Mw earthquake lasted for several minutes. It caused buildings to sway in Jakarta, and some buildings were reported to have collapsed in the city of Bengkulu, Bengkulu Province, about 100 km from the epicenter. Tremors felt in Jakarta were described as being "violent". It was reported that several high-rise buildings were evacuated. The earthquake also led to a power outage in Bengkulu, which crippled communications. The death toll of the earthquakes is 21 with 88 people injured.

Tremors were felt in neighboring countries as far away as Southern Thailand. In Singapore, which is about 670 km from the epicenter, the tremor was felt at around 11:10 UTC (19:10 local time). Most of the Central and Eastern part of Singapore had felt the tremor. In Peninsular Malaysia, tremors were reported after 19:15 local time, including Kuala Lumpur, Putrajaya, Johor Bahru, Malacca and Penang. Like Singapore, the tremors were most severe on high-rises, resulting in minor panic and evacuations. No casualties were reported in the country, as of 13 September.Sea level readings indicated that a tsunami was generated. A total of 4 tsunami alerts were issued in 24 hours. After the first, and largest, earthquake, the Pacific Tsunami Warning Centre issued a tsunami alert for much of the Indian Ocean basin. A tsunami approximately 1 meter high was reported at Padang, Indonesia. A small tsunami, some 15 cm high, was reported at the Cocos Islands. Sumatra was taken off tsunami alert after two hours.

Tsunami warnings were also issued in India and other countries around the Indian Ocean soon after the earthquake. The Government of India asked the states of Tamil NaduKeralaAndhra Pradesh and the union territories of Andaman and Nicobar Islands and Puducherry to be on high alert. By late 12 September, the tsunami warning was recalled. Similarly, a tsunami alert was issued in Peninsular Malaysia at 20:50 (local time) for the coastal areas of PerlisKedahPerak and Penang; the alert was lifted two hours later. However, Malaysian authorities had detected a 1-3m high tsunami heading away from the epicenter of the earthquake.

Source: WIKIPEDEA September 2007 Sumatra earthquakes

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