M1.5 earthquake 11km NNE of Coso Junction, CA

A magnitude 1.5 earthquake struck 11km NNE of Coso Junction, CA on Sun, Dec 27, 2020, 5:26 PM PST (01:26 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M4.0 10km SE of Olancha, CA. This one was a foreshock.

Map

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

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
1.54	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.182 · 22 stations
1.6	ML, local (Richter)	Nevada Seismological Laboratory	Reviewed · ±1.06 · 6 stations

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 198 in the 60 days after this one and 113 in the 30 days before it.

The first 60 of 198.

From the USGS Earthquake Hazards Program and its partner networks, event ci39505607 (also filed as nn00795003). Read Sat, Oct 3, 2026, 3:00 AM UTC.