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M6.1 Sembuang Earthquake, 2003


23 January 2003


NE of Sembuang, Sumatra


02:58:51 UTC (01:38:38 IST)


04.521 N (ISC)


97.554 E (ISC)


33.0 kms (ISC)


MS 6.1 (ISC); Mb 5.7 (ISC)

Additional Info

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A strong earthquake struck western parts northern Sumatra, on 23 January 2003 at 16:51 PM local time. It had a magnitude of MS=6.1 and was felt in parts of the sparsely populated Ngari region causing minor damage.

The earthquake was centred
9.7 kms NE of Sembuang (Sumatra), Indonesia,
14.2 kms WSW of Penaron (Sumatra), Indonesia,
28.9 kms W of Jambo Campli (Sumatra), Indonesia,
46 kms WNW of Langsa (Sumatra), Indonesia,
68.4 kms NNE of Blangkejeren (Sumatra), Indonesia,
84.1 kms SSE of Lhokseumawe (Sumatra), Indonesia,
165 kms NW of Medan (Sumatra), Indonesia,
272 kms SE of Banda Aceh (Sumatra), Indonesia,
381 kms SSW of Phuket (Phuket), Thailand,
489 kms WNW of Kuala Lumpur, Malaysia

This earthquake was felt strongly at at Medan on Sumatra sending many people running outdoors in panic. It was also felt at Langsa and Pangkalanbrandan on Sumatra. Across the Malacca Straits, it was felt in high-rise buildings at Kota Baharu and Petaling Jaya in Malaysia for a few seconds. A 14-storey building was evacuated in Kota Baharu following the tremor. Tremors were also felt at Kuala Lumpur as well as the rest of the Klang Valley, Kedah, Penang and Kelantan areas. Long period effects were perceived as far as high-rise buildings in Bangkok, Thailand. At Phuket it was felt for close to 3-minutes. It was also felt in the southern province of Hat Yai, Thailand. Fishermen reported big waves in the Andaman Sea off the Thai provinces of Satun, Trang and Phuket just after the earthquake.

01) International Seismological Centre (ISC), Berkshire.
02) Macroseismic information has been compiled by the ASC from reports by local media and local NGO personnel

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Page Updated: 21 Feb 2008 | Website Disclaimer

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