M2.3 earthquake 14km NE of Tecopa, CA

A magnitude 2.3 earthquake struck 14km NE of Tecopa, CA on Mon, May 28, 2018, 9:48 PM PDT (04:48 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.5 15 km WNW of Sandy Valley, Nevada. 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 · ±0.121 · 43 stations
2.2	ML, local (Richter)	Nevada Seismological Laboratory	Reviewed · ±0.29 · 12 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: 9 in the 60 days after this one and 2 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ci37951663 (also filed as nn00637234). Read Sat, Oct 3, 2026, 3:49 AM UTC.