Chile earthquakes

M4.1 earthquake 31 km SW of Valparaíso, Chile

A magnitude 4.1 earthquake struck 31 km SW of Valparaíso, Chile on Fri, Mar 12, 2021, 1:00 PM GMT-3 (16:00 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M5.5 82 km WSW of San Antonio, 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
4.1 (Mwr, regional moment), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2021-03-12 16:00:26 UTC
Depth
24.2 km (15.0 mi), shallow
Epicenter
33.213° S, 71.891° W
Region
Chile
Felt reports
11
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

11 people reported to the USGS what they felt; the strongest reported shaking was V, moderate 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
4.1 Mwr
Nodal plane 1
Strike 353°, dip 20°, rake 99°
Nodal plane 2
Strike 164°, dip 70°, rake 87°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 4.1 km horizontally, 4.2 km in depth
Magnitude uncertainty
±0.04
Depth from
From location
Station coverage gap
149°
Stations used
37

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 13 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 5.185 km WSW of San Antonio, Chile · 1994 days ago · 13 km deep · 97 km away · felt by 42
  2. 5.285 km WSW of San Antonio, Chile · 1994 days ago · 9 km deep · 98 km away · felt by 23
  3. 5.181 km WSW of San Antonio, Chile · 1994 days ago · 10 km deep · 95 km away · felt by 17
  4. 5.079 km WSW of San Antonio, Chile · 1994 days ago · 10 km deep · 94 km away · felt by 17
  5. 4.281 km WSW of San Antonio, Chile · 1994 days ago · 3 km deep · 95 km away
  6. 4.281 km WSW of San Antonio, Chile · 1994 days ago · 10 km deep · 95 km away · felt by 1
  7. 4.478 km WSW of San Antonio, Chile · 1994 days ago · 10 km deep · 91 km away · felt by 5
  8. 5.582 km WSW of San Antonio, Chile · 1991 days ago · 13 km deep · 97 km away · felt by 37
  9. 4.184 km WSW of San Antonio, Chile · 1990 days ago · 10 km deep · 98 km away
  10. 4.284 km WSW of San Antonio, Chile · 1990 days ago · 10 km deep · 99 km away · felt by 2
  11. 4.082 km SW of San Antonio, Chile · 1990 days ago · 10 km deep · 100 km away · felt by 1
  12. 4.178 km SW of San Antonio, Chile · 1984 days ago · 23 km deep · 96 km away
  13. 4.579 km WSW of San Antonio, Chile · 1979 days ago · 10 km deep · 89 km away · felt by 1

Before

  1. 4.1Near the coast of Valparaiso, Chile · 2033 days ago · 24 km deep · 70 km away · felt by 6
  2. 3.9Off the coast of Valparaiso, Chile · 2047 days ago · 22 km deep · 76 km away · felt by 1
  3. 4.461 km W of Valparaíso, Chile · 2053 days ago · 25 km deep · 38 km away · felt by 9
  4. 4.4near the coast of central Chile · 2060 days ago · 45 km deep · 50 km away · felt by 14

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000divm. Read Sun, Oct 4, 2026, 6:00 AM UTC.