Chile earthquakes

M5.7 earthquake 22 km SW of Valparaíso, Chile

A magnitude 5.7 earthquake struck 22 km SW of Valparaíso, Chile on Thu, Feb 21, 1985, 3:53 PM GMT-3 (18:53 UTC), 56 km (35 mi) below the surface.

A larger quake followed: M8.0 25 km WSW of Valparaíso, 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: 5.7 (mw), moderate
Local time: Thu, Feb 21, 1985, 3:53 PM GMT-3
UTC: 1985-02-21 18:53:11 UTC
Depth: 55.9 km (34.7 mi), shallow
Epicenter: 33.205° S, 71.768° W
Region: Chile
Strongest shaking: V, moderate 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: V, moderate shaking
Peak ground acceleration: 6.2% of gravity
Peak ground velocity: 0.7 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: FROM_LOCATION

Nearest places

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

Nearby

Within 100 km, magnitude 2.5 and up: 167 in the 60 days after this one and 2 in the 30 days before it.

After

The first 60 of 167.

Before

Earthquakes today Chile earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002c3g (also filed as gcmtb022185b, gcmt19850221185308, iscgem532684). Read Tue, Sep 22, 2026, 10:40 AM UTC.