M2.1 earthquake 11 km S of Huron, California

A magnitude 2.1 earthquake struck 11 km S of Huron, California on Thu, Sep 6, 1984, 9:20 PM PDT (04:20 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.4 4 km WSW of Avenal, 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
2.06	Md, duration	Northern California Seismic System	Preferred · Final · ±0.2 · 22 stations
2.3	Mh	Southern California Seismic Network	Final · 3 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: 138 in the 60 days after this one and 70 in the 30 days before it.

The first 60 of 138.

From the USGS Earthquake Hazards Program and its partner networks, event nc27462 (also filed as ci512823). Read Thu, Oct 1, 2026, 3:24 PM UTC.