M2.8 earthquake 2km S of Llano, CA

A magnitude 2.8 earthquake struck 2km S of Llano, CA on Sun, Jan 20, 2002, 7:08 AM PST (15:08 UTC), 1 km (0 mi) below the surface.

A larger quake followed: M4.2 13km NE of Simi 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
2.79	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.223 · 45 stations
2.8	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

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

Felt in the epicentral area.

From the USGS event page for ci9750829. 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: 174 in the 60 days after this one and 60 in the 30 days before it.

The first 60 of 174.

From the USGS Earthquake Hazards Program and its partner networks, event ci9750829 (also filed as usp000awuz). Read Mon, Oct 5, 2026, 4:41 AM UTC.