M3.7 earthquake 5 km WNW of Cobb, California

A magnitude 3.7 earthquake struck 5 km WNW of Cobb, California on Thu, Mar 15, 1990, 11:19 AM PST (19:19 UTC), 1 km (1 mi) below the surface.

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
3.7	ML, local (Richter)	Northern California Seismic System	Preferred · Final · 0 stations
4.1	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

The USGS’s account of the effects of this earthquake.

Felt (IV) at Cobb, Finley and Loch Lomond.

From the USGS event page for nc1174003. U.S. Geological Survey text and figures are in the public domain.

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: 173 in the 60 days after this one and 104 in the 30 days before it.

The first 60 of 173.

From the USGS Earthquake Hazards Program and its partner networks, event nc1174003 (also filed as usp00046na). Read Sun, Oct 4, 2026, 2:41 PM UTC.