More information regarding Oklahoma earthquake...

The 4.7 and 5.6 earthquakes that rocked central Oklahoma this weekend have certainly been a hot topic of discussion, as many claim claim the ground waves were felt locally.

Earthquakes are not unusual in Oklahoma, but they often are too small to be felt. From 1972-2008 about 2-6 earthquakes a year were recorded by the USGS National Earthquake Information Center. In 2008, earthquake activity began to increase, with over a dozen earthquakes recorded that year. In 2009 the rate continued to climb, with nearly 50 quakes recorded--many big enough to be felt. The earthquakes from 1973-2007 were scattered broadly across the east-central part of the state.

More information about the Oklahoma quakes can be found here: http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/usb0006klz.php#summary

-our thanks to Ron Nissan