■Earthquake activity: Upton County-area historical earthquake activity is significantly above Texas state average. It is 39% smaller than the overall U.S. average. On 4/14/1995 at 00:32:56, a magnitude 5.7 (5.6 MB, 5.7 MS, 5.7 MW, Depth: 11.1 mi, Class: Moderate, Intensity: VI - VII) earthquake occurred 105.3 miles away from Upton County center On 6/16/1978 at 11:46:54, a magnitude 5.3 (4.4 MB, 4.6 UK, 5.3 ML) earthquake occurred 140.6 miles away from the county center On 1/2/1992 at 11:45:35, a magnitude 5.0 (4.6 MB, 5.0 LG, Depth: 3.1 mi) earthquake occurred 91.2 miles away from the county center On 4/15/1995 at 14:33:29, a magnitude 4.0 (4.0 LG, Depth: 6.2 mi, Class: Light, Intensity: IV - V) earthquake occurred 103.8 miles away from the county center
On 12/19/2005 at 20:27:40, a magnitude 4.3 (4.3 MB, 4.1 MW, Depth: 3.1 mi) earthquake occurred 166.3 miles away from Upton County center On 5/23/2004 at 09:22:05, a magnitude 4.0 (4.0 MB, 4.0 LG, Depth: 3.1 mi) earthquake occurred 167.1 miles away from the county center Magnitude types: regional Lg-wave magnitude (LG), body-wave magnitude (MB), local magnitude (ML), surface-wave magnitude (MS), moment magnitude (MW)
Read more: http://www.city-data.com/county/Upton_County-TX.html
ead more: http://www.city-data.com/county/Upton_County-TX.html
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