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Small Quake North of Birmingham

| 1:11 pm December 5, 2012

Late update… USGS has deleted this event after a review by a seismologist… Seems like it was related to mining.

Steve Jones… Our quake expert…

A small magnitude 2.5 earthquake was registered by the USGS earlier this morning at 16:01:05 UTC (10:01:05 am CST), in Alabama, east of the city of Jasper in extreme northern Jefferson County, at a location approximately 103 km (64 mi) from Huntsville. The quake focus was located at a depth of 1 km (0.6 mi). There have been no reports of damages or injuries from the quake.

In Huntsville, the initial P (pressure) seismic body wave arrival was seen approximately 20 seconds after the quake occurred, and the S (shear) body waves began to arrive at approximately +31 seconds. The slower-traveling surface waves began to arrive about 36 seconds after the quake occurred, peaking with a maximum vertical ground movement of approximately 651 nanometers (nm) seen at the AlabamaQuake seismic station.

The local seismogram and earthquake epicenter location map have been posted at the AlabamaQuake website (http://alabamaquake.com) on the “Huntsville Seismograms” and “Recent Earthquake Maps” pages, and have also been attached to this message.

Please let me know if you have any questions or comments by posting an update on the AlabamaQuake discussion blog at http://www.facebook.com/alabamaquake.

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