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Reporting System

5.6 Magnitude EQ – Northern California

A moderate earthquake struck Northern California’s coast Monday afternoon, rattling nerves around the Oregon border but yielding no immediate reports of major injuries or damage.

The magnitude-5.6 quake struck at 1:07 p.m. about 18 miles (30 kilometers) east of Trinidad, in an unincorporated part of Humboldt County, the U.S. Geological Survey said. The epicenter was a rural area near the small community of Weitchpec on the Hoopa Valley Indian Reservation, about 240 miles (350 kilometers) north of San Francisco and about 60 miles (96 kilometers) south of the Oregon border.

The temblor was widely felt within a 100-mile (160-kilometer) radius, but the National Oceanic and Atmospheric Administration said it wasn’t large enough to generate a tsunami.

The Humboldt County Sheriff’s Department and Eureka Police Department sent deputies and officers to check on residents, but dispatchers said there were no immediate reports of emergencies. Things also seemed fine on the Hoopa reservation, according to Byron Nelson Jr., the tribe’s vice chairman.

“It was just a mild shaking. It wasn’t a sharp jerk,” said Sgt. Gene McManus of the Del Norte County Sheriff’s Department, a neighboring agency that also saw no immediate problems.

On January 9, 2010, a 6.5 earthquake 25 miles southwest of Eureka ‘snapped power lines’. The last major earthquake, a magnitude 7.2 on April 25, 1992, which triggered a small tsunami. Eureka is located near the Mendocino Triple Junction Region, “one of the most seismically active regions of the San Andreas transform system”.

…(Associated Press)

At approximately 21:07:02 UTC on Monday, February 13th, an earthquake based on land struck at a fairly shallow depth of 32.9 km (20.4 miles) in the region of Northern California, 10 km (6 miles) WSW of Weitchpec, CA, and 29 km (18 miles) ENE of Trinidad, CA. Coords: 41.153°N, 123.817°W

Initially reported by the USGS as a 5.3, then upgraded to a 5.5, and then 5.6.

…(USGS)

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February 14, 2012 - Posted by | Seismic | , , , , ,

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