CUSHING, Okla. (CBS/AP) — A series of small earthquakes have been recorded across northern Oklahoma following two moderate earthquakes in the area the previous day.

The U.S. Geological Survey reports nine quakes ranging in magnitude from 2.5 to 3.7 were recorded between 5:07 p.m. Saturday and 5:27 a.m. Sunday. No injuries or damage are reported. Geologists say damage is not likely in quakes below magnitude 4.0.

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Those follow a 4.5 magnitude temblor Saturday afternoon near Cushing and a 4.4 magnitude quake Saturday morning southwest of Medford.

Oklahoma Quake Map

Two magnitude 4-plus quakes shook Oklahoma on Saturday. (KPIX)

Cushing is where the world’s most important crude oil storage hub is located and it is used to settle futures contracts traded on the New York Mercantile Exchange. Cushing Emergency Management Director Bob Noltensmeyer has said there are no reports of significant damage, only “shattered nerves.”

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This article will be updated as information warrants, and follow KPIX 5 on Twitter at @CBSSF or KCBS Radio on Twitter at @KCBSNews for updates on breaking news anytime.

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