By John Dobberstein, Editor
The city of Edmond said it is investigating for any damage that might have been caused by the series of earthquakes that happened Friday and Saturday near Arcadia.
The Oklahoma Geological Survey said it would also continue to monitor seismic activity in the area.
OGS said here was a 4.3 magnitude quake at 9:46 p.m. Friday yesterday evening, followed by a 4.1 earthquake at 5:36 a.m. Saturday. There were reports of strong shaking in the immediate area and across Oklahoma City. The 4.3 quake yesterday evening was preceded by a 3.2 foreshock almost 10 minutes prior to the 4.4.
In addition, there has been activity along this fault in the last month starting on Dec. 29, with 5 events between 1.0-1.6 magnitude through Jan. 6.
“The seismicity from the last decade indicates there were 3 magnitude 4.0 or greater events in 2015 and 2017, corresponding to a time period when wastewater disposal volumes were higher,” OGS said in a statement. “Whereas most aftershocks are smaller than the mainshock, a very small fraction of aftershocks result in a larger earthquake than the main event.
“The seismic hazard remains high in the area.”
The city of Edmond is inspecting facilities and infrastructure to identify and assess impacts of the earthquakes.
“We are in contact with state officials investigating the occurrences, as well as the Corps of Engineers, who will inspect the dam at Arcadia Lake for impacts,” Edmond officials said. “All new water and wastewater infrastructure in place as part of the city’s on-going water infrastructure improvements – including water towers – are built to structurally handle the seismic activity, but will be inspected to ensure their integrity and ability to continue to deliver safe, clean water to Edmond residents.”
Residents were encouraged to inspect their homes and structures for impacts and ensure they are safe. The city said it will provide updates on any findings from its inspections or from the state’s assessments.
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