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Magnitude 7.3 - SOUTHERN SUMATRA, INDONESIA

2004 July 25 14:35:18 UTC

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Earthquake Details

Magnitude 7.3 (Major)
Date-Time
  • Sunday, July 25, 2004 at 14:35:18 (UTC)
    = Coordinated Universal Time
  • Sunday, July 25, 2004 at 9:35:18 PM
    = local time at epicenter
  • Time of Earthquake in other Time Zones
    Location 2.455°S, 103.977°E
    Depth 576 km (357.9 miles) set by location program
    Region SOUTHERN 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 Uncertainty horizontal +/- 5.1 km (3.2 miles); depth fixed by location program
    Parameters Nst=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 ID uslial
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    Earthquake Summary

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    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.

    Earthquake Summary Map

    Earthquake Information for Indonesia

    Earthquake Maps

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    Additional Information, News Reports


    • Preliminary Earthquake Report
    • U.S. Geological Survey, National Earthquake Information Center
      World Data Center for Seismology, Denver

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