M1.8 earthquake 6 km NW of Philo, California

A magnitude 1.8 earthquake struck 6 km NW of Philo, California on Thu, Jan 16, 1986, 7:59 PM PST (03:59 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M2.0 6 km W of Cobb, 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: 190 in the 60 days after this one and 8 in the 30 days before it.

The first 60 of 190.

From the USGS Earthquake Hazards Program and its partner networks, event nc1134873. Read Tue, Sep 22, 2026, 6:53 PM UTC.