M3.7 earthquake 71km ENE of Maneadero, B.C., MX

A magnitude 3.7 earthquake struck 71km ENE of Maneadero, B.C., MX on Wed, May 22, 1985, 3:10 AM PDT (10:10 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.3 71km WSW of Alberto Oviedo Mota, B.C., MX. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.7	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · 5 stations
3.7	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

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: 191 in the 60 days after this one and 153 in the 30 days before it.

The first 60 of 191.

From the USGS Earthquake Hazards Program and its partner networks, event ci66973 (also filed as usp0002f2y). Read Sat, Oct 3, 2026, 3:21 PM UTC.