Jim Lawson of the Oklahoma Geological Survey said that the first earthquake felt in Oklahoma in 2007 was detected at 3:45 p.m. Monday.

The epicenter was five miles south of Tupelo and four miles Nort of Clarita in Coal County. Residents heard popping sounds and felt chairs moving.

This earthquake had a magnitude of 2.5.

It was located near the epicenter of a magnitude 4.4 earthquake that occurred Sept. 6, 1997. The difference in shaking between a magnitude 2.5 and 4.4 is nearly 100. The difference in energy release is close to 1,000. The 1997 earthquake was felt over one-third of Oklahoma.

Lawson asks that if anyone felt and/or heard Monday's earthquake to please log on to www.okgeosurvey1.gov and click on "Report an Oklahoma Earthquake"?

Lawson can also be reached by phone at 918-366-4152, or by e-mailing him at jim@okgeosurvey1.gov

Oklahoma Geological Survey is located in Leonard.