OKLAHOMA CITY, Aug. 19 (UPI) -- Oklahoma City residents received an early morning shock on Tuesday as a 4.2-magnitude earthquake hit the area.
The quake was recorded striking at 7:41 a.m. CT with tremors resonating from the town of Guthrie, about 40 miles north of Oklahoma City. The U.S. Geological Survey recorded it as a 4.2-magnitude earthquake while the Oklahoma Geological Survey says the quake was a 4.3.
According to the USGS, 145 earthquakes with a magnitude of 3.0 or greater hit Oklahoma between January and May 2, 2014, far surpassing 2013's then record-setting 109 earthquakes. Between 1978 and 2008 Oklahoma only averaged two earthquakes per year.
"As is the case elsewhere in the world, there is evidence that some central and eastern North America earthquakes have been triggered or caused by human activities that have altered the stress conditions in earth's crust sufficiently to induce faulting," said the USGS in a report about Tuesday's earthquakes.
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"Activities that have induced felt earthquakes in some geologic environments have included impoundment of water behind dams, injection of fluid into the earth's crust, extraction of fluid or gas, and removal of rock in mining or quarrying operations."
Who felt the quake? http://t.co/5CbxQDBpUX pic.twitter.com/VOnMasmrVp
— KOKH FOX 25 (@OKCFOX) August 19, 2014Seismograph of most recent Oklahoma quake. Happened around 7:42am. #okquake #earthquake pic.twitter.com/CCTpg0891z
— Kyle Roberts (@KyleWeather) August 19, 2014NEW #earthquake, OKLAHOMA, M4.2, 7:41a CDT, focus 2.2 mi deep, USGS report http://t.co/8s3uVyaUKC pic.twitter.com/r2yf8HsfTi
— Steve Jones (@alabamaquake) August 19, 2014Oklahoma City just got rocked with what many are calling "the strongest earthquake I've ever felt," per loads of tweets.
— Brian Rie$ (@moneyries) August 19, 2014Video: Magnitude 4.2 earthquake rattles on-air staff at Oklahoma station this morning: http://t.co/bPxhnPIQ2k pic.twitter.com/wgHWNVFRnF
— NBC Chicago (@nbcchicago) August 19, 2014
