M1.7 earthquake 4km E of Progreso, B.C., MX

A magnitude 1.7 earthquake struck 4km E of Progreso, B.C., MX on Sun, Oct 9, 1977, 6:47 AM PDT (13:47 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M4.1 7km W of Holtville, 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 86 in the 30 days before it.

The first 60 of 197.

From the USGS Earthquake Hazards Program and its partner networks, event ci3335129. Read Sun, Oct 4, 2026, 6:40 PM UTC.