M2.3 earthquake 26km ESE of Boron, CA

A magnitude 2.3 earthquake struck 26km ESE of Boron, CA on Wed, May 20, 2020, 4:32 AM PDT (11:32 UTC), 1 km (1 mi) below the surface.

A larger quake followed: M5.5 17km S of Searles Valley, 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
2.25	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.165 · 14 stations
2.3	ML, local (Richter)	Nevada Seismological Laboratory	Reviewed · ±0 · 2 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: 193 in the 60 days after this one and 77 in the 30 days before it.

The first 60 of 193.

From the USGS Earthquake Hazards Program and its partner networks, event ci37445821 (also filed as nn00729296). Read Sun, Oct 4, 2026, 6:39 AM UTC.