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

Source: Los Angeles Times May 02, 2019 05:27 UTC