They shook the earth hard enough for agencies like Fresno County Fire to go into their "earthquake procedure." All trucks and equipment were moved out of buildings and the structures were checked for damage. No damage was found, but several people were alarmed.
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The U.S. Geological Surveys says a 5.7 temblor struck at 12:18 a.m., followed by another 5.7 four minutes later in a remote area 18 miles southwest of Hawthorne, Nevada. A magnitude 5.5 quake hit the same area at 1:13 a.m.
The moderate quakes were followed by a series of smaller aftershocks.
The Mineral County Sheriff's Department in Hawthorne hasn't received reports of injury or damage.
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The Associated Press contributed to this story.