Compare this to the map of Oklahoma's fault lines. That's especially worrisome because there are as many as 12 fault zones capable of triggering a magnitude-5 or -6 earthquake, McNamara told Reuters. On earlier USGS maps, Oklahoma was a seismic afterthought. E-mail; Oklahoma Fault Lines Maps Provided by Oklahoma Geological Survey . Neighboring Kansas, Missouri and Arkansas reportedly felt the tremors. Oklahoma has been hit last night with the strongest earthquake recorded in the area to date. Last year the state experienced almost 900 3-plus magnitude earthquakes; in 2007, it recorded just one. Current OK Quakes; OGS Report; USGS Map USA; USGS Map OK; OK Earthquake Track; Report Earthquakes Here; Be Earthquake Prepared; Oklahoma Fault Lines Oklahoma Fault Lines of Central and Northern Oklahoma Oklahoma Fault Data Base. Two maps of Oklahoma fault lines.

Here's a USGS map that shows all of the 1,800-plus earthquakes, 2.5 magnitude or higher, that have hit Oklahoma since the beginning of this year.

The 5.6 magnitude quake struck at 10:53 a.m. and lasted nearly a full minute. It was centered 44 miles east-northeast of Oklahoma City. More …