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== PRELIMINARY EARTHQUAKE REPORT ==
U.S. Geological Survey, National Earthquake Information Center

Version #C: This report supersedes any earlier reports of this event.
This event has been reviewed by a seismologist.

A moderate earthquake occurred at 10:53:10 PM (CDT) on Saturday, November 5, 2011 .
The magnitude 5.6 event occurred 10 km (6 miles) SE of Sparks, OK .
The hypocentral depth is 5 km ( 3 miles).


Magnitude 5.6 - moment magnitude (Mw)
Time Saturday, November 5, 2011 at 10:53:10 PM (CDT)
Sunday, November 6, 2011 at 3:53:10 (UTC)
Distance from Sparks, OK - 10 km (6 miles) SE (139 degrees)
Johnson, OK - 17 km (11 miles) NNE (30 degrees)
Bethel Acres, OK - 36 km (22 miles) NE (45 degrees)
Midwest City, OK - 60 km (37 miles) E (80 degrees)
Coordinates 35 deg. 32.2 min. N (35.537N), 96 deg. 44.8 min. W ( 96.747W)
Depth 5 km (3.1 miles)
Quality Poor
Location Quality Parameters Nst=189, Nph=192, Dmin=26.7 km, Rmss=1.06 sec, Erho=10.5 km, Erzz=2.8 km, Gp=28.8 degrees
Event ID# usb0006klz
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For more information, see http://earthquake.usgs.gov/research/monitoring/anss/neic/

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