Chile earthquakes

M3.9 earthquake 42 km SW of Valparaíso, Chile

A magnitude 3.9 earthquake struck 42 km SW of Valparaíso, Chile on Thu, Apr 27, 2017, 6:17 PM GMT-3 (21:17 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M5.9 37 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
3.9 (mwr), minor
Local time
UTC
2017-04-27 21:17:32 UTC
Depth
21.8 km (13.6 mi), shallow
Epicenter
33.258° S, 72.004° W
Region
Chile
Felt reports
1
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting
Reverse (thrust)
Moment magnitude
3.9 Mwr
Nodal plane 1
Strike 16°, dip 21°, rake 111°
Nodal plane 2
Strike 174°, dip 71°, rake 82°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 4.6 km horizontally, 7.3 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
103°
Stations used
50

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 45 in the 60 days after this one and 110 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us10008lev. Read Sun, Sep 27, 2026, 10:20 AM UTC.