M4.1 earthquake 136 km WSW of Copiapó, Chile

A magnitude 4.1 earthquake struck 136 km WSW of Copiapó, Chile on Mon, Jul 2, 1973, 5:50 AM GMT-4 (09:50 UTC), 19 km (12 mi) below the surface.

A larger quake followed: M6.3 120 km WNW of Copiapó, Chile. 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: 48 in the 60 days after this one and 0 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event usp00002gk. Read Sun, Sep 27, 2026, 5:36 AM UTC.