Earthquakes in Oklahoma, 4.5 magnitude

The great earthquakes in the New Madrid, Mo., region in 1811-1812, and a strong earthquake centered in Arkansas on Oct. 22, 1881, likely were felt in the area that is now Oklahoma.
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5.1 magnitude earthquake shakes Oklahoma

Oct 13A magnitude 5.1 earthquake shook central Oklahoma at 9:06 am. The…
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* Oklahoma earthquake rating upgraded to magnitude 5.1
10/13/2010 An earthquake that struck central Oklahoma today was the second-strongest in the state’s history, the Oklahoma Geological Survey reported. No significant…

The first recorded earthquake known to have been centered in the state occurred on Dec. 2, 1897, in Grant County.

In September 1918, a series of shocks in El Reno produced only minor effects.

On Dec. 27, 1929, another quake was felt in portions of central and western Oklahoma. Some plaster cracked and at least one chimney fell in El Reno. Clocks stopped, objects moved and some reports indicated walls and floors swayed. People rushed from their homes in alarm.

A magnitude 5.5 earthquake on April 9, 1952, was centered near El Reno and affected most of Oklahoma and parts of Arkansas, Iowa, Kansas, Missouri, Nebraska and Texas. Damage from the 10:30 a.m. earthquake was not extensive, but many people near the epicenter were alarmed. Portions of chimneys fell in El Reno and Ponca City. Bricks loosened from a building wall and tile facing of commercial buildings bulged in Oklahoma City. Plate glass windows were shattered in the business district of El Reno. Aftershocks were felt on April 11, 15 and 16, July 16 and Aug. 14. Homes and buildings shook and people were awakened in El Reno in the April 16 aftershock, at 12:05 a.m. People reported feeling the earthquake in Kingfisher, Oklahoma City, Tulsa and Union City.