4.5 Mb - ANTOFAGASTA, CHILE

Preliminary Earthquake Report
Magnitude	4.5 Mb
Date-Time	31 Jan 2011 23:55:26 UTC 31 Jan 2011 19:55:26 near epicenter 31 Jan 2011 23:55:26 standard time in your timezone
Location	23.830S 67.654W
Depth	91 km
Distances	192 km (119 miles) W (281 degrees) of San Salvador de Jujuy, Argentina 197 km (122 miles) SE (139 degrees) of Calama, Chile 245 km (152 miles) WNW (295 degrees) of Salta, Argentina 1022 km (635 miles) W (277 degrees) of ASUNCION, Paraguay
Location Uncertainty	Horizontal: 30.8 km; Vertical 0.5 km
Parameters	Nph = 23; Dmin = 187.0 km; Rmss = 1.20 seconds; Gp = 108° M-type = Mb; Version = 4
Event ID	US b00017a3

For updates, maps, and technical information, see: Event Page
or USGS Earthquake Hazards Program
National Earthquake Information Center
U.S. Geological Surveyhttp://neic.usgs.gov/

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