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Earthquake Hazards Program

Magnitude 2.8 SOUTHERN TEXAS

Saturday, April 11, 2009 at 22:14:20 UTC

Preliminary Earthquake Report

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Magnitude 2.8
Date-Time
  • Saturday, April 11, 2009 at 22:14:20 (UTC) - Coordinated Universal Time
  • Saturday, April 11, 2009 at 05:14:20 PM local time at epicenter

  • Time of Earthquake in other Time Zones
    Location 28.88N 98.53W
    Depth 5 kilometers
    Region SOUTHERN TEXAS
    Distances 55 km (35 miles) E of Pearsall, Texas
    60 km (40 miles) S of San Antonio, Texas
    90 km (55 miles) NW of Beeville, Texas
    170 km (105 miles) SSW of AUSTIN, Texas
    Location Uncertainty Error estimate: horizontal +/- 25.2 km; depth fixed by location program
    Parameters Nst=5, Nph=5, Dmin=216.7 km, Rmss=0.72 sec, Erho=25.2 km, Erzz=0 km, Gp=212.2 degrees
    Source USGS NEIC (WDCS-D)
    Remarks Felt at Jourdanton and Pleasanton.
    Event ID usfhbs

    Tectonic Summary

    Location Maps

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    Historic Seismicity

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    National Seismic Hazard Mapping Project USGS National Seismic Hazard Mapping Project

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    Earthquake Information for Texas

    Earthquakes: Frequently Asked Questions

    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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