04 August, 2017
Four hours later, a less intense quake of a preliminary magnitude 3.5 struck the area in the early hours of Thursday. This one took place just after midnight at 12:18 p.m. Wednesday and measured a 3.5. The commission also said that no disposal wells are in the area but a known fault is in the vicinity. The area hit is about 15 miles (25 kilometers) northeast of Oklahoma City.
The quake late Wednesday was the largest magnitude natural disaster to strike the area, near the city of Edmond, since Tuesday night. The quake, one of several felt in Edmond in the last two days, knocked out power in parts of the city.
The quake knocked out power to more than 4,600 homes and businesses.
The Oklahoma Corporation Commission says its Induced Seismicity Department and the Oklahoma Geological Survey are investigating the quakes.
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Regulators in Oklahoma issued an natural disaster advisory and launched an investigation focused on oil and gas wastewater disposal wells after a series of earthquakes struck the state, including a 4.2-magnitude temblor that struck near Edmond, a suburb of Oklahoma City, on Wednesday night.
The 4.4 temblor Wednesday night is the state's fourth quake of at least magnitude 4.0 recorded in 2017, according to Oklahoma Geological Survey records.
No injuries or significant damage are reported.
Scientists have linked some oil and gas production in Oklahoma to an uptick in earthquakes, but the frequency of earthquakes had dropped recently as the state imposed restrictions on the injection of wastewater into underground disposal wells.