8 Earthquakes Rumble Through Oklahoma


On Oct. 10, 2015, a total of eight earthquakes rumbled through Oklahoma. A magnitude 4.5 temblor hit the state at 22:03 UTC. The depth at its hypocenter was only 1.98 km. Residents have been warned to anticipate aftershocks. Secondary rumbles or shock waves will generally not rise above the quake’s initial Richter scale reading. However, they can still cause more damage to structures that have already been weakened. Aftershocks may not come immediately, or even the same day as the earthquake. In fact, it could take anywhere from days to a month before a community can be deemed safe from subsequent seismic activity following an earthquake.

People are being asked to put out small fires caused by the tremors.

Oklahoma has experienced a number of earthquakes today, with magnitudes ranging from 2.9 to 4.5. They began in Perry at 3:08 UTC.

Since the 4.5 magnitude tremor, there have been three more; one was a 4.5 M that happened at the same time as the other 4.5 quake. The other two were both 3.0 magnitude, and they both occurred at 22:20 UTC.

The first 4.5 M tremor was reported to have lasted six seconds. One person reported that it was the largest earthquake they had ever felt.

By Jeanette Smith

Public Alert: M 4.5 Earthquake, 5 km WNW of Cushing, Oklahoma
Earthquake-Report: Moderate Earthquake – Cushing, Oklahoma on Oct. 10, 2015

Image Courtesy of anyjazz65’s Flickr Page – Creative Commons License

One Response to "8 Earthquakes Rumble Through Oklahoma"

  1. Andrew Fritz   October 12, 2015 at 11:21 am

    It seems like Oklahoma is always at the center of large scale disasters related to human-caused activity; dust bowl and now earthquakes caused by fracking.


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