M2.1 earthquake 11km NE of Yucaipa, CA

A magnitude 2.1 earthquake struck 11km NE of Yucaipa, CA on Sun, Oct 10, 2021, 12:38 AM PDT (07:38 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M3.6 7km S of Lytle Creek, CA. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

1 person reported to the USGS what they felt; the strongest reported shaking was I, not felt shaking.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 87 in the 60 days after this one and 53 in the 30 days before it.

The first 60 of 87.

From the USGS Earthquake Hazards Program and its partner networks, event ci40066856. Read Sun, Oct 4, 2026, 3:23 PM UTC.