M3.1 earthquake 7km S of Ensenada, B.C., MX

A magnitude 3.1 earthquake struck 7km S of Ensenada, B.C., MX on Sat, Jan 7, 1978, 2:17 AM PST (10:17 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.5 80km SE of Maneadero, 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
3.1	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.109 · 2 stations
3.1	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: 27 in the 60 days after this one and 8 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event ci9997014 (also filed as usp0000sd3). Read Thu, Oct 1, 2026, 11:47 AM UTC.