Chile earthquakes

M5.5 earthquake 31 km NNW of Valparaíso, Chile

A magnitude 5.5 earthquake struck 31 km NNW of Valparaíso, Chile on Wed, Jul 17, 1985, 9:53 AM GMT-4 (13:53 UTC), 33 km (21 mi) below the surface.

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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: 5.5 (mw), moderate
Local time: Wed, Jul 17, 1985, 9:53 AM GMT-4
UTC: 1985-07-17 13:53:00 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 32.760° S, 71.718° W
Region: Chile
Strongest shaking: IV, light 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: IV, light shaking
Peak ground acceleration: 5.4% of gravity
Peak ground velocity: 0.6 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: 9 in the 60 days after this one and 18 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 usp0002gv7 (also filed as gcmtb071785b, gcmt19850717135302, iscgem520532). Read Wed, Sep 30, 2026, 5:42 AM UTC.