M1.7 earthquake 4km SW of Buttonwillow, CA

A magnitude 1.7 earthquake struck 4km SW of Buttonwillow, CA on Thu, Apr 7, 1988, 7:28 PM PDT (02:28 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.5 8km ENE of Taft, CA. 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: 45 in the 60 days after this one and 26 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ci747548. Read Wed, Sep 30, 2026, 5:35 AM UTC.