M1.8 earthquake 48km SSW of Progreso, B.C., MX

A magnitude 1.8 earthquake struck 48km SSW of Progreso, B.C., MX on Fri, Nov 11, 1983, 8:21 AM PST (16:21 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.4 24km WSW of Westmorland, 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: 197 in the 60 days after this one and 2 in the 30 days before it.

The first 60 of 197.

From the USGS Earthquake Hazards Program and its partner networks, event ci24763. Read Wed, Sep 23, 2026, 1:05 PM UTC.