M4.0 - OKLAHOMA

Preliminary Earthquake Report
Magnitude	4.0
Date-Time	23 Mar 2015 23:29:54 UTC 23 Mar 2015 18:29:55 near epicenter 23 Mar 2015 17:29:54 standard time in your timezone
Location	36.621N 97.642W
Depth	1 km
Distances	22 km (14 mi) SSE of Medford, Oklahoma 32 km (20 mi) NE of Enid, Oklahoma 50 km (31 mi) W of Ponca City, Oklahoma 72 km (45 mi) SW of Arkansas City, Kansas 128 km (79 mi) N of Oklahoma City, Oklahoma
Location Uncertainty	Horizontal: 3.2 km; Vertical 7.1 km
Parameters	Nph = 104; Dmin = 32.5 km; Rmss = 0.56 seconds; Gp = 20° Version =
Event ID	us 10001q2d

For updates, maps, and technical information, see: Event Page or USGS Earthquake Hazards Program

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