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The maximum credible earthquake expected to be generated from the Healdsburg Fault is estimated to be about 7.5 on the Richter scale. [1] The last major event in Sonoma County were the 1969 Santa Rosa earthquakes, a magnitude 5.6 and 5.7 doublet that occurred on this fault. The county anticipates similar events every 20–30 years. [2]
The National Weather Service said that the tsunami warning that extended along 500 miles (800 km) of the California and Oregon coasts was called off about 90 minutes after the earthquake struck at ...
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A magnitude 4.2 earthquake was felt widely across the nation's second largest city Friday and shook things off shelves near the epicenter in a small mountain community east of Los Angeles, but ...
The Maacama Fault is a right lateral-moving (dextral) geologic fault located in the Coast Ranges of northwestern California.It is considered to be the northernmost segment of the Hayward Fault subsystem of the San Andreas Fault zone.
Geological structures near Santa Rosa, showing the epicenters of the 1969 earthquakes. At 04:56 and 06:19 UTC on October 2, 1969 (21:56 and 23:19 PDT October 1), a pair of earthquakes of magnitude 5.6 and 5.7, respectively, struck the city of Santa Rosa, California, killing one person and damaging buildings.
Until Sunday, the strongest earthquake in the past month to hit San Bernardino County's fourth most populous city occurred on Sept. 7, when a magnitude 3.9 earthquake caused "light" shaking to be ...
SAN FRANCISCO ‒ A magnitude 7.0 earthquake struck near the town of Petrolia on Thursday at 10:44 a.m. local time, generating a now discontinued tsunami warning that stretched from southern ...