Magnitude 7.3 - SOUTHERN SUMATRA, INDONESIA

2004 July 25 14:35:18 UTC

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Earthquake Details

  • This event has been reviewed by a seismologist.
Magnitude7.3
Date-Time
Location 2.455°S, 103.977°E
Depth576 km (357.9 miles) set by location program
RegionSOUTHERN SUMATRA, INDONESIA
Distances 105 km (65 miles) NW of Palembang, Sumatra, Indonesia
105 km (65 miles) SSE of Jambi, Sumatra, Indonesia
415 km (255 miles) S of SINGAPORE
510 km (315 miles) NW of JAKARTA, Java, Indonesia
Location Uncertaintyhorizontal +/- 5.1 km (3.2 miles); depth fixed by location program
ParametersNST=334, Nph=334, Dmin=201.3 km, Rmss=0.86 sec, Gp= 40°,
M-type=teleseismic moment magnitude (Mw), Version=S
Source
  • USGS NEIC (WDCS-D)
Event IDuslial
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Earthquake Summary

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Earthquake Summary Map

  • USGS News Release
  • Felt Reports

    Felt (IV) at Bengkulu and (III) at Padangpanjang. Felt (III) at Bandung, Bogor, Sawahan and Sukabumi; (II) at Jakarta, Java. Also felt (III) at Mataram, Lombok. Felt throughout Bali, Java, Lombok and Sumatra. Also felt in southern Johor, Malaysia and on Singapore.

    Tectonic Summary

    The earthquake occurred deep beneath the island of Sumatra, which is one of many islands in the large Indonesian island-arc system. Off the southwest coast of Sumatra, the Indo-Australian Plate subducts northwards beneath the Eurasian Plate at a rate of about 6 cm/yr. At the earth's surface, the boundary between the plates is marked by the 3400 km long Java (Sunda) Trench. The subducted Indo-Australian plate has previously been known to be seismically active to a depth of about 650 km beneath Java, but this magnitude 7.3 earthquake is one of the few to occur below 300 km beneath the island of Sumatra. Due to the earthquake's depth it was felt over a large area, but caused little damage.

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