M 8.1 - 2021 South Sandwich Islands Earthquake
August 12, 2021 at 18:35:17 UTC
Depth: 22.79 km (Shallow)
Great
PAGER Alert
Tsunami
Felt Reports
Event Details
| Magnitude | 8.1 mww |
| Depth | 22.79 km (Shallow) |
| Location | -58.3753S, 25.2637W |
| Mercalli Intensity | VI (Strong) |
| Alert Level (PAGER) | Green — No fatalities or damage expected |
| Tsunami Warning | No |
| Significance | 1009 / 3000 |
| Status | Reviewed |
| Network | us |
| USGS Event Page | View on USGS → |
Frequently Asked Questions
What does magnitude 8.1 mean?
A magnitude 8.1 earthquake is classified as "Great". Great earthquakes can cause devastating damage over very large areas.
How deep was this earthquake?
This earthquake occurred at a depth of 22.79 km, classified as "Shallow". Shallow earthquakes tend to cause more damage at the surface.
Nearby Recent Earthquakes
South Sandwich Islands region
4 years ago · 117.42 km deep
South Sandwich Islands region
4 years ago · 79.67 km deep
South Sandwich Islands region
4 years ago · 97.00 km deep
South Sandwich Islands region
4 years ago · 106.33 km deep
South Sandwich Islands region
4 years ago · 96.58 km deep
South Sandwich Islands region
4 years ago · 125.62 km deep
South Sandwich Islands region
4 years ago · 35.00 km deep
South Sandwich Islands region
4 years ago · 37.36 km deep
South Sandwich Islands region
4 years ago · 35.00 km deep
South Sandwich Islands region
4 years ago · 10.00 km deep
More M8.0-9.0 Earthquakes
2025 Kamchatka Peninsula, Russia Earthquake
7 months ago · 35.00 km deep
2021 Chignik, Alaska Earthquake
4 years ago · 35.00 km deep
2021 Kermadec Islands, New Zealand Earthquake
5 years ago · 28.93 km deep
78 km NE of Navarro, Peru
6 years ago · 122.57 km deep
2018 Fiji Earthquake
7 years ago · 600.00 km deep
2017 Tehuantepec, Mexico Earthquake
8 years ago · 47.39 km deep
48 km W of Illapel, Chile
10 years ago · 22.44 km deep
93 km NW of Iquique, Chile
11 years ago · 25.00 km deep
Data from the USGS Earthquake Hazards Program (ComCat). QuakeScan is not affiliated with the USGS. Event details may be updated as new data becomes available.