M4.5 earthquake 79 km WSW of San Antonio, Chile
A magnitude 4.5 earthquake struck 79 km WSW of San Antonio, Chile on Tue, May 4, 2021, 11:18 AM GMT-4 (15:18 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.1 57 km WSW of San Antonio, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (Mwr, regional moment), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-05-04 15:18:22 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 33.904° S, 72.385° 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 III, weak shaking.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Oblique reverse
- Moment magnitude
- 4.5 Mwr
- Nodal plane 1
- Strike 52°, dip 23°, rake 133°
- Nodal plane 2
- Strike 187°, dip 73°, rake 74°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.9 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 151°
- Stations used
- 49
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 21 in the 30 days before it.
After
- 4.332 km W of San Antonio, Chile · 1945 days ago · 31 km deep · 52 km away
- 4.354 km WSW of San Antonio, Chile · 1939 days ago · 23 km deep · 27 km away · felt by 3
- 5.157 km WSW of San Antonio, Chile · 1939 days ago · 15 km deep · 25 km away · felt by 26
- 4.566 km SW of San Antonio, Chile · 1936 days ago · 18 km deep · 24 km away · felt by 2
- 4.324 km NNW of Cartagena, Chile · 1935 days ago · 29 km deep · 89 km away · felt by 39
- 4.389 km WSW of San Antonio, Chile · 1933 days ago · 10 km deep · 11 km away · felt by 1
Before
- 4.178 km SW of San Antonio, Chile · 1983 days ago · 23 km deep · 14 km away
- 4.288 km WSW of San Antonio, Chile · 1984 days ago · 10 km deep · 14 km away
- 4.7Near the coast of Libertador O'Higgins, Chile · 1984 days ago · 13 km deep · 14 km away
- 4.082 km SW of San Antonio, Chile · 1989 days ago · 10 km deep · 16 km away · felt by 1
- 4.187 km SW of San Antonio, Chile · 1989 days ago · 10 km deep · 18 km away
- 4.287 km SW of San Antonio, Chile · 1989 days ago · 10 km deep · 19 km away · felt by 1
- 4.191 km WSW of San Antonio, Chile · 1989 days ago · 10 km deep · 15 km away
- 4.284 km WSW of San Antonio, Chile · 1989 days ago · 10 km deep · 11 km away · felt by 2
- 4.184 km WSW of San Antonio, Chile · 1989 days ago · 10 km deep · 10 km away
- 4.286 km SW of San Antonio, Chile · 1990 days ago · 10 km deep · 18 km away
- 4.484 km SW of San Antonio, Chile · 1990 days ago · 10 km deep · 16 km away · felt by 5
- 5.582 km WSW of San Antonio, Chile · 1990 days ago · 13 km deep · 10 km away · felt by 37
- 4.479 km SW of San Antonio, Chile · 1991 days ago · 10 km deep · 22 km away
- 4.583 km SW of San Antonio, Chile · 1991 days ago · 10 km deep · 15 km away
- 4.478 km WSW of San Antonio, Chile · 1993 days ago · 10 km deep · 5 km away · felt by 5
- 4.281 km WSW of San Antonio, Chile · 1993 days ago · 10 km deep · 9 km away · felt by 1
- 4.281 km WSW of San Antonio, Chile · 1993 days ago · 3 km deep · 8 km away
- 5.079 km WSW of San Antonio, Chile · 1993 days ago · 10 km deep · 8 km away · felt by 17
- 5.181 km WSW of San Antonio, Chile · 1993 days ago · 10 km deep · 8 km away · felt by 17
- 5.285 km WSW of San Antonio, Chile · 1993 days ago · 9 km deep · 9 km away · felt by 23
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000e00q. Read Sat, Oct 3, 2026, 8:12 AM UTC.