Chile earthquakes

M6.3 earthquake 36 km WSW of Valparaíso, Chile

A magnitude 6.3 earthquake struck 36 km WSW of Valparaíso, Chile on Mon, Mar 4, 1985, 3:17 AM GMT-3 (06:17 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.7 35 km WNW of Hacienda La Calera, Chile. This one was a foreshock.

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Map

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

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The earthquake

Magnitude: 6.3 (ms), strong
Local time: Mon, Mar 4, 1985, 3:17 AM GMT-3
UTC: 1985-03-04 06:17:51 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 33.142° S, 71.997° W
Region: Chile
Strongest shaking: VI, strong shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: VI, strong shaking
Peak ground acceleration: 13.1% of gravity
Peak ground velocity: 2.1 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Depth from: OPERATOR_ASSIGNED

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 2.5 and up: 130 in the 60 days after this one and 41 in the 30 days before it.

After

The first 60 of 130.

Before

Earthquakes today Chile earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002cdm (also filed as atlas19850304061751, iscgem529117). Read Tue, Sep 22, 2026, 10:08 AM UTC.