M2.8 earthquake 22km NW of Weitchpec, CA

A magnitude 2.8 earthquake struck 22km NW of Weitchpec, CA on Wed, Mar 31, 2021, 5:14 AM PDT (12:14 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M2.8 11km NW of Eureka, 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
2.83	ML, local (Richter)	Northern California Seismic System	Preferred · Final · ±0.198 · 12 stations
2.7	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.044 · 69 stations

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak 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: 17 in the 60 days after this one and 6 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event nc73544430 (also filed as us6000dxxy). Read Sun, Oct 4, 2026, 12:24 AM UTC.