Magnitude 7.2 - SANTA CRUZ ISLANDS

2007 September 02 01:05:18 UTC

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Earthquake Details

  • This event has been reviewed by a seismologist.
Magnitude7.2
Date-Time
Location11.510°S, 165.814°E
Depth35 km (21.7 miles) set by location program
RegionSANTA CRUZ ISLANDS
Distances95 km (60 miles) S of Lata, Santa Cruz Islands, Solomon Isl.
435 km (270 miles) ESE of Kira Kira, San Cristobal, Solomon Isl.
680 km (420 miles) ESE of HONIARA, Guadalcanal, Solomon Islands
2205 km (1370 miles) NE of BRISBANE, Queensland, Australia
Location Uncertaintyhorizontal +/- 9.7 km (6.0 miles); depth fixed by location program
ParametersNST=136, Nph=136, Dmin=681 km, Rmss=1.02 sec, Gp= 61°,
M-type=centroid moment magnitude (Mw), Version=8
Source
  • USGS NEIC (WDCS-D)
Event IDus2007guae
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Earthquake Summary

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Earthquake Summary Poster

  • The following is a release by the United States Geological Survey, National Earthquake Information Center: An earthquake occurred about 95 km (60 miles) S of Lata, Santa Cruz Islands, Solomon Isl. or about 440 km (275 miles) ESE of Kira Kira, San Cristobal, Solomon Isl. or about 680 km (425 miles) ESE of HONIARA, Guadalcanal, Solomon Islands at 7:05 PM MDT, Sep 1, 2007 (Sep 02 at 12:05 PM local time in Santa Cruz Islands). The magnitude and location may be revised when additional data and further analysis results are available.

  • Tectonic Summary

    The Santa Cruz Islands earthquake of September 2, 2007, occurred along the boundary between the Pacific plate and Australia plates. In the region of the earthquake, the Australia plate moves to the east-northeast with respect to the Pacific plate at a velocity of about 91 mm/y. The Australia plate thrusts under the Pacific plate at the North New Hebrides trench and dips to the east-northeast. The September 2 earthquakes location and focal mechanism are consistent with the earthquake having occurred as thrust-faulting on the plate interface.

    The Santa Cruz Islands region experiences a very high level of earthquake activity, with over a dozen shocks of magnitude 7 and larger having been recorded since the early decades of the twentieth century. The subducting Australia plate is seismically active to depths of about 250 km beneath the islands

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    Tsunami Information

    The earthquake locations and magnitudes cited in NOAA tsunami statements and bulletins are preliminary and are superseded by USGS locations and magnitudes computed using more extensive data sets.

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    General Tsunami Information


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