Chile earthquakes

M6.3 earthquake 17 km S of Melipilla, Chile

A magnitude 6.3 earthquake struck 17 km S of Melipilla, Chile on Mon, Mar 4, 1985, 12:01 PM GMT-3 (15:01 UTC), 40 km (25 mi) below the surface.

A larger quake followed: M6.7 18 km S of Valparaíso, Chile. This one was a foreshock.

Melipilla forecast More in Chile

Map

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

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The earthquake

Magnitude: 6.3 (mw), strong
Local time: Mon, Mar 4, 1985, 12:01 PM GMT-3
UTC: 1985-03-04 15:01:07 UTC
Depth: 40.1 km (24.9 mi), shallow
Epicenter: 33.842° S, 71.249° 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: 16.6% of gravity
Peak ground velocity: 2.2 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: CONSTRAINED_BY_DEPTH_PHASES

Nearest places

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

Nearby

Within 100 km, magnitude 2.5 and up: 56 in the 60 days after this one and 42 in the 30 days before it.

After

Before

Earthquakes today Chile earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002cec (also filed as choy19850304150109, gcmtb030485d, gcmt19850304150106, atlas19850304150113, iscgem529154). Read Wed, Sep 23, 2026, 2:18 AM UTC.