M3.6 earthquake 34km S of Progreso, B.C., MX

A magnitude 3.6 earthquake struck 34km S of Progreso, B.C., MX on Wed, May 22, 1940, 10:35 AM GMT-8 (18:35 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.2 8km WNW of Delta, B.C., MX. 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: 24 in the 60 days after this one and 29 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ci3365311. Read Tue, Sep 22, 2026, 3:46 PM UTC.