Another Mag 4.0 Quake, 3 Smaller Ones Strike Oklahoma

The U.S. Geological Survey reports a magnitude 4.0 earthquake and three smaller temblors have struck Oklahoma.

The survey reported that the magnitude 4.0 quake hit on March 25 south of Medford in north-central Oklahoma. Three smaller temblors — with magnitudes of 3.5, 3.0 and 2.8, all struck near Perry.

A magnitude 4.0 earthquake also struck the state earlier in the week, on March 22, along with two smaller quakes. The larger quake was recorded near Stroud, located about 60 miles northeast of Oklahoma City. Two smaller quakes were also recorded. A magnitude 2.7 quake struck near Fairview and a magnitude 2.5 temblor hit near Mooreland.

No injuries or damage were immediately reported. Geologists say damage is not likely in earthquakes below magnitude 4.0.

Thousands of earthquakes have been recorded in Oklahoma in recent years, and many have been linked to the underground injection of wastewater from oil and natural gas operations.

Regulators have directed oil and natural gas producers to close some disposal wells or reduce the volume of fluids they inject.

Related:

• Magnitude 4.0 Quake and 2 Smaller Temblors Reported in Oklahoma