M1.6 earthquake 12 km WSW of Byron, California

A magnitude 1.6 earthquake struck 12 km WSW of Byron, California on Tue, May 29, 1990, 4:06 AM PDT (11:06 UTC), 12 km (8 mi) below the surface.

A larger quake followed: M4.1 6 km NE of East Foothills, 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: 112 in the 60 days after this one and 140 in the 30 days before it.

The first 60 of 112.

From the USGS Earthquake Hazards Program and its partner networks, event nc158509. Read Sat, Oct 3, 2026, 5:29 PM UTC.