Chile earthquakes

M3.7 earthquake 50 km WNW of Cartagena, Chile

A magnitude 3.7 earthquake struck 50 km WNW of Cartagena, Chile on Fri, Apr 28, 2017, 2:38 PM GMT-3 (17:38 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M5.3 40 km SW 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
3.7 (Mwr, regional moment), minor
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-04-28 17:38:08 UTC
Depth
20.1 km (12.5 mi), shallow
Epicenter
33.308° S, 72.063° 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 I, not felt 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
3.7 Mwr
Nodal plane 1
Strike 28°, dip 12°, rake 103°
Nodal plane 2
Strike 195°, dip 78°, rake 87°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 2.5 km horizontally, 8.3 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
173°
Stations used
45

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 126 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us10008lnb. Read Fri, Oct 2, 2026, 4:43 PM UTC.