M2.6 earthquake 6 km SW of Bootjack, California

A magnitude 2.6 earthquake struck 6 km SW of Bootjack, California on Sat, Jun 30, 1979, 7:09 AM PDT (14:09 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M3.8 18 km NE of Waterford, 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
2.62	Md, duration	Northern California Seismic System	Preferred · Final · 1 stations
3.08	ML, local (Richter)	Southern California Seismic Network	Final · ±0.243 · 2 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: 17 in the 60 days after this one and 6 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event nc1046379 (also filed as ci12247779). Read Sat, Oct 3, 2026, 4:12 AM UTC.