Residents across the Pacific Northwest—a region where catastrophic earthquake risk looms as an inescapable reality—depend on ShakeAlert, the country's only public earthquake early warning system, to buy precious seconds before the ground starts to move.

The United States Geological Survey put out a false alarm for a 5.9 earthquake east of Dayton, Nevada, on Thursday morning.

LATEST, Dec. 8, 3:15 p.m. Oakland is the latest Bay Area city to be jolted by an earthquake on Monday. The shake happened at 2:55 p.m. and had a preliminary magnitude of 2.9, according to the U.S. Geological Survey. The quake also had a depth of 2.85 miles, with an epicenter located north of Montclair.

HUMBOLDT COUNTY, CA - A 2.6 magnitude quake was detected close to Petrolia Sunday night, the U.S. Geological Survey reported.

A shake alert went out over the U.S. Geological Survey's early warning system on Dec. 4, warning that a 5.9 earthquake near Carson City in western Nevada could produce heavy shaking in the region. But moments later,

A notification about a magnitude-5.9 earthquake in western Nevada near the California border was a false alert, the USGS said.

An alert that notified Bay Area residents of a 5.9 earthquake Thursday morning in Nevada was deleted by the U.S. Geological Survey. The ShakeAlert message at 8:08 a.m. said the quake was about 15 miles east of Carson City, near Dayton. Within minutes, though, the notification was deleted.

Two small earthquakes were recorded near Concrete on Monday morning, according to the U.S. Geological Survey. The first earthquake, measured at magnitude 2.6, was recorded at 7:06 a.m. about 4 kilometers west-southwest of Concrete. The USGS reported the quake occurred at a depth of about 5.5 kilometers beneath the surface.

Several earthquakes, the largest measured at magnitude-3.3, were reported Thursday morning in Ventura County. The earthquakes were centered near Fillmore, about 25 miles northeast of Ventura. Shaking was reported in Fillmore, Moorpark, Ventura and Santa Paula.