M2.1 earthquake 13 km NE of Mesa, California

A magnitude 2.1 earthquake struck 13 km NE of Mesa, California on Sat, Aug 31, 2002, 3:59 AM PDT (10:59 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M3.8 9 km W of Aspen Springs, California. 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
2.09	Md, duration	Northern California Seismic System	Preferred · Final · ±0.17 · 23 stations
2.1	ML, local (Richter)	Nevada Seismological Laboratory	Reviewed

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: 109 in the 60 days after this one and 40 in the 30 days before it.

The first 60 of 109.

From the USGS Earthquake Hazards Program and its partner networks, event nc30224833 (also filed as nn00055491). Read Mon, Oct 5, 2026, 1:18 PM UTC.