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Very strong mag. 6.5 earthquake - 42 km northeast of Pulau Siaimu Island, Sumatra Barat, Indonesia, on Wednesday, August 4, 1993 at 11:31 GMT

Very strong mag. 6.5 earthquake - 42 km northeast of Pulau Siaimu Island, Sumatra Barat, Indonesia, on Wednesday, August 4, 1993 at 11:31 GMT

Very strong magnitude 6.5 earthquake at 32 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Aug 4, 1993 11:31:18 UTC
Magnitude: 6.5
Depth: 31.6 km
Epicenter latitude / longitude: 1.629°S / 99.615°E (Indian Ocean, Indonesia)
Antipode: 1.629°N / 80.385°W
Nearest volcano: Talang (139 km / 86 mi)
Nearby towns and cities:
112 km (69 mi) SW of Padang (pop: 840,400) --> See nearby quakes!
126 km (78 mi) SSW of Pariaman (pop: 92,200) --> See nearby quakes!
148 km (92 mi) SW of Solok (pop: 48,400) --> See nearby quakes!
169 km (105 mi) SSW of Bukittinggi (pop: 98,700) --> See nearby quakes!
183 km (114 mi) SW of Sijunjung (pop: 27,800) --> See nearby quakes!
194 km (120 mi) SW of Payakumbuh (pop: 121,600) --> See nearby quakes!
203 km (126 mi) WNW of Sungai Penuh (pop: 95,900) --> See nearby quakes!
313 km (195 mi) SW of Pekanbaru (pop: 704,000) --> See nearby quakes!
381 km (237 mi) NW of Benkulu (pop: 309,700) --> See nearby quakes!
951 km (591 mi) WNW of Jakarta (pop: 8,540,100) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 3.5 x 1014 joules (98.6 gigawatt hours, equivalent to 84802 tons of TNT or 5.3 atomic bombs!) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
6.532 kmKepulauan Mentawai region, IndonesiaUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
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Recorded aftershocks, latest first (3 quakes)

Date and timeMag
Jan 15, 1994 03:59
28 years ago

102 km
Pulau Cubadak, 10.9 km S of Padang, Sumatra Barat, IndonesiaMore
Sep 30, 1993 05:41
29 years ago

69 km
33 km S of Pulau Aurgadang Island, Sumatra Barat, IndonesiaMore
Sep 12, 1993 06:35
29 years ago

48 km
Pulau Cubadak, 39 km S of Padang, Sumatra Barat, IndonesiaMore

Earlier earthquakes in the same area

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