The USGS recorded a 3.3 magnitude natural disaster at 11:11 a.m., just more than four miles east northeast of Edmond at a depth of about thrree miles.
Edmond's police department reported no significant damages from that quake, but many locals and households were shaken up.
The first natural disaster was a 3.0 on the richter scale and occurred at about 9:42 p.m. Tuesday at a depth of 1.49 miles.
Residents in the Edmond area reported moderate shaking to the USGS through their "Did You Feel It?" reporting system. It knocked out two electric substations, leaving about 1,900 customers without power for about an hour.
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Four hours later, a less intense natural disaster of a preliminary magnitude 3.5 struck the area in the early hours of Thursday.
Seismologists and state officials have said an increase in the frequency of quakes over the past few years in Oklahoma has been tied to the disposal of wastewater from fracking. "There are no Arbuckle disposal wells at or very close to the location". This one took place just after midnight at 12:18 p.m. Wednesday and measured a 3.5.
The wells lie within a 10-mile radius of the seismic activity and target the sponge-like Arbuckle formation. Since then an additional six earthquakes, ranging from 2.9 to 3.5 in magnitude, have hit the state - two of them (of 3.3 and 3.5 magnitude) were near Edmond.
The Edmond area is part of the much larger natural disaster Area of Interest (AOI) in which the OCC has instituted volume reductions in Arbuckle disposal well operations.