Southwest of Calistoga: Magnitude 3.3 Earthquake is felt in Sonoma and Napa counties

A magnitude 3.3 earthquake hit around four miles southwest of Calistoga and was felt in Sonoma and Napa districts.

In excess of 500 people reported feeling the shaking, which hit at 10:17 p.m. Wednesday, and revealed it to the U.S. Geographical Survey’s Did You Feel It? crowdsourcing website. Light shaking, or power level 4 shaking on the Modified Mercalli Mercalli Intensity Scale, was felt in the Calistoga area.

Santa Clause Rosa, Napa and Sonoma, cities a bit farther from the epicenter, felt frail shaking, or intensity level 3 shaking, as per the USGS crowdsourcing website.

Magnitude 3 earthquakes are fairly common in California. There have been 28 earthquakes of magnitude 3 or greater in the California and Nevada areas in the last 30 days.

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