M4.3 earthquake 21 km NNE of San Martín, Argentina
A magnitude 4.3 earthquake struck 21 km NNE of San Martín, Argentina on Sat, Aug 7, 2021, 7:30 PM GMT-3 (22:30 UTC), 109 km (68 mi) below the surface.
A larger quake followed: M4.7 40 km NNW of San Martín, Argentina. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-08-07 22:30:04 UTC
- Depth
- 108.9 km (67.7 mi), intermediate-depth
- Epicenter
- 31.250° S, 68.416° W
- Region
- Argentina
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 8.4 km horizontally, 5.6 km in depth
- Magnitude uncertainty
- ±0.16
- Depth from
- From location
- Station coverage gap
- 113°
- Stations used
- 48
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.323 km WSW of Pocito, Argentina · 1884 days ago · 15 km deep · 67 km away
- 4.642 km WSW of Villa Basilio Nievas, Argentina · 1880 days ago · 108 km deep · 85 km away · felt by 1
- 4.740 km NNW of San Martín, Argentina · 1877 days ago · 108 km deep · 27 km away · felt by 2
- 4.334 km NW of Villa Basilio Nievas, Argentina · 1867 days ago · 115 km deep · 59 km away
- 4.24 km S of Villa Basilio Nievas, Argentina · 1864 days ago · 107 km deep · 48 km away
Before
Earthquakes todayArgentina earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000f38v. Read Mon, Oct 5, 2026, 2:53 AM UTC.