Earthquake: 5.5 earthquake near Brooktrails reported erroneously

Earthquake: 4.7 quake strikes near Brooktrails, Calif.
A map showing the location of the epicenter of Saturday morning’s quake near Brooktrails, Calif..
(Bing Maps)

A shallow magnitude 5.5 earthquake was reported Saturday morning seven miles from Brooktrails, Calif., according to the U.S. Geological Survey. The temblor occurred at 4:33 a.m. PDT at a depth of 23.6 miles.



9:02 a.m.: This post is incorrect, with the USGS reporting that sensors in California misidentified seismic activity from a magnitude 7.8 quake that struck off the coast of Japan several minutes earlier. 


“It’s bogus,” said John Bellini, a USGS geophysicist. “When the waves from these big quakes hit [the Northern Californian sensor] network they think it’s a local quake. They have some kind of filtering system, but it’s not working properly. There is some problem with that on their end.”


According to the USGS, the epicenter was 27 miles from Ukiah, 60 miles from Clearlake and 68 miles from Healdsburg.

In the last 10 days, there has been one earthquake of magnitude 3.0 or greater centered nearby.


This information comes from the USGS Earthquake Notification Service and this post was created by an algorithm.

Read more about Southern California earthquakes.


6.7 quake strikes off Alaska coast

Earthquake: 3.8 quake strikes near Indio, Calif.

Powerful quake strikes off Japan; no tsunami warning issued

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