M1.8 earthquake Central California

A magnitude 1.8 earthquake struck in Central California on Sat, Jun 30, 1984, 4:49 AM PDT (11:49 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M3.2 12 km SW of Huron, California. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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: 136 in the 60 days after this one and 69 in the 30 days before it.

The first 60 of 136.

From the USGS Earthquake Hazards Program and its partner networks, event nc21825. Read Fri, Oct 2, 2026, 8:45 AM UTC.