Magnitude 5.0 earthquake shakes central Oklahoma

2016-11-07 09:41

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Cushing — A sharp earthquake centred near one of the world's key oil hubs on Sunday night triggered fears that the magnitude 5.0 temblor might have damaged key infrastructure in addition to causing what police described as "quite a bit of damage" in the Oklahoma prairie town of Cushing.

The Oklahoma Corporation Commission said it and the Oklahoma Geological Survey were investigating after the quake, which struck at 19:44 and was felt as far away as Iowa, Illinois and Texas.

"The OCC's Pipeline Safety Department has been in contact with pipeline operators in the Cushing oil storage terminal under state jurisdiction and there have been no immediate reports of any problems," the commission's spokesperson, Matt Skinner, said in a statement. "The assessment of the infrastructure continues."

The oil storage terminal is one of the world's largest.

The Cushing Police Department reported "quite a bit of damage" from the earthquake but details were not immediately available. Photos posted to social media show piles of debris at the base of commercial buildings in the city.

The Cushing Public School District has cancelled classes on Monday in order to assess the earthquake damage.

Cushing which has a population of about 7 900, bills itself as the "Pipeline Crossroads of the World".

Oklahoma has had thousands of earthquakes in recent years, with nearly all traced to the underground injection of wastewater left over from oil and gas production. Sunday's quake was centred 1.6km west of Cushing — and about 40km south of where a magnitude 4.3 quake forced a shutdown of several wells last week.

The US Geological Survey said initially that Sunday's quake was of magnitude 5.3 but later lowered the reading to 5.0.

According to USGS data, there have been 19 earthquakes in Oklahoma in the past week. When particularly strong quakes hit, the Oklahoma Corporation Commission directs well operators to seize wastewater injections or reduce volume.

A 5.8 earthquake — a record for Oklahoma — hit Pawnee on September 3. Shortly afterward, geologists speculated on whether the temblor occurred on a previously unknown fault.

Read more on:    us  |  earthquakes

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