anti-fracking groups hardest hit.
"The majority of the recent earthquakes in central Oklahoma define
reactivated ancient faults at shallow depths in the crust" of less than
3.7 miles (6 km), said the report for the American Geophysical Union.
Yes, they spend a lot of words saying 'it MAY be related to'; and they'll keep trying to blame fracking as long as possible.
Did a bit of digging, and in the pre-fracking era,
The magnitude 5.5
April 9, 1952,
earthquake
centered near El Reno affected
most of Oklahoma and parts of
Arkansas, Iowa, Kansas, Missouri,
Nebraska, and Texas.
Damage
from the 10:30 a.m. CST earthquake
was not extensive, but many people
in the epicentral area were alarmed,
some to near panic. Portions of chimneys
fell in El Reno and Ponca City
(intensity VII). Bricks loosened from a
building wall and tile facing of commercial
buildings bulged at Oklahoma City.
Also, plate glass windows were shattered
in the business district of El Reno.
The total damage amounted to several
thousand dollars. Aftershocks were felt
on April 11, 15, and 16, July 16, and
August 14; an earthquake that was felt
(IV) at Holdenville and Wewoka on
October 7 apparently was unrelated to
the April 9th event. Homes and buildings
shook and some persons were
awakened (V) at El Reno from the
April 16th shock, which occurred 5
minutes after midnight. Felt reports
were also received from Kingfisher,
Oklahoma City, Tulsa, and Union City.
Minor damage to a building foundation
and plaster (VI) at Concho
resulted from two March 17, 1953, earthquakes
about an hour apart. The felt
area included Calumet, Edmond,
El Reno, Minco, Okarche, Peidmont, and
Union City.
Which kind of makes the quakes nothing new, just a new spasm of activity, it would seem.
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