Chile earthquakes

M4.4 earthquake 44 km WSW of Valparaíso, Chile

A magnitude 4.4 earthquake struck 44 km WSW of Valparaíso, Chile on Fri, Apr 28, 2017, 10:37 PM GMT-3 (01:37 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M5.2 39 km WNW 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
4.4 (Mwr, regional moment), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-04-29 01:37:16 UTC
Depth
20.1 km (12.5 mi), shallow
Epicenter
33.225° S, 72.053° 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
4.4 Mwr
Nodal plane 1
Strike 143°, dip 77°, rake 65°
Nodal plane 2
Strike 27°, dip 28°, rake 151°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 4.5 km horizontally, 4.9 km in depth
Magnitude uncertainty
±0.03
Depth from
From location
Station coverage gap
160°
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: 20 in the 60 days after this one and 135 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us10008lww. Read Fri, Oct 2, 2026, 4:07 AM UTC.