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Earthquake Hazards Program

Magnitude 4.6 LOYALTY ISLANDS

Friday, April 17, 2009 at 18:10:56 UTC

Preliminary Earthquake Report

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Magnitude 4.6
Date-Time
  • Friday, April 17, 2009 at 18:10:56 (UTC) - Coordinated Universal Time
  • Saturday, April 18, 2009 at 05:10:56 AM local time at epicenter

  • Time of Earthquake in other Time Zones
    Location 20.23S 168.16E
    Depth 10 kilometers
    Region LOYALTY ISLANDS
    Distances 140 km (85 miles) WSW of Isangel, Tanna, Vanuatu
    145 km (90 miles) NNE of Tadine, Loyalty Islands, New Caledonia
    275 km (170 miles) S of PORT-VILA, Efate, Vanuatu
    1740 km (1080 miles) ENE of BRISBANE, Queensland, Australia
    Location Uncertainty Error estimate: horizontal +/- 12.0 km; depth fixed by location program
    Parameters Nst=23, Nph=23, Dmin=270.0 km, Rmss=0.95 sec, Erho=12.0 km, Erzz=0 km, Gp=109.7 degrees
    Source USGS NEIC (WDCS-D)
    Event ID usfnfp

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    NB: The official magnitude for this earthquake is indicated at the top of this page. This was the best available estimate of the earthquake's size, at the time that this page was created. Other magnitudes associated with web pages linked from here are those determined at various times following the earthquake with different types of seismic data. Although, given the data used, they are legitimate estimates of magnitude they are not considered the official magnitude.

    The region name is an automatically generated name from the Flinn-Engdahl (F-E) seismic and geographical regionalization scheme. The boundaries of these regions are defined at one-degree intervals and therefore differ from irregular political boundaries. More->

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


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