Lenzy Krehbiel-Burton reports one of the strongest earthquakes ever recorded in Oklahoma rattled the area northwest of Pawnee on Saturday, fuelling growing concern about seismic activity linked to energy production, a federal agency said. The magnitude 5.6 quake, which was felt from South Dakota to Texas, prompted the closure of some 35 wastewater disposal wells in the area, officials said.
It shallow quake struck 9 miles (14 km) northwest of Pawnee in north-central Oklahoma at 7:02 a.m. CDT (1302 GMT). Its 5.6 magnitude matched a 2011 earthquake for the biggest on record in the state, the U.S. Geological Survey said. There were no immediate reports of injuries in Pawnee, where about 25% of the residents are Native Americans. Damage in the town appeared to be minor, and the Pawnee Nation declared a state of emergency for its area.
You heard it before it happened, Pawnee resident Jasha Lyons Echo-Hawk said. Watching my drawers all shake out and my headboard rattle, it felt like I was watching Paranormal Activity. It felt like I was in a movie.
Pawnee Mayor Brad Sewell said the tremor lasted nearly a minute, far longer than previous ones that lasted only a second or two. Part of the facade of an early 20th-century bank building fell into a downtown street, he said. The earthquake, which was only 4.1 miles (6.6 km) deep, could fuel concerns about the environmental impact of oil and gas drilling, which has been blamed for a massive spike in minor to moderate quakes in the region.
Following the tremor, the state Corporation Commission ordered 35 wastewater disposal wells within a 500-square-mile (1,295-square-km) area to shut down, Governor Mary Fallin said via Twitter. Oklahoma has been recording 2.5 earthquakes daily of magnitude 3 or greater, a seismicity rate 600 times greater than before 2008, the Oklahoma Geological Survey (OGS) said.
Oklahoma economy is heavily dependent on oil and gas production, which accounts for one of every four jobs in the state.
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