| Magnitude | 5.4 |
| Alert | Strong |
| Depth | 33.0 km |
| Coordinates | -56.322, -25.721 |
| UTC time | 1977-09-17 17:43:09.200 |
Earthquake details
Saturday, September 17, 1977 Earthquake
The earthquake hit South Sandwich Islands region on Saturday, September 17, 1977 at 17:43 UTC with a magnitude of 5.4. The closest known location in the current dataset is Ushuaia, about 2643.4 km away. The epicenter is located at longitude -25.721 and latitude -56.322.
| Location | South Sandwich Islands region |
| Country | South Sandwich Islands region |
| Severity | Strong |
Earthquake map 1977-09-17
Closest countries
The 12 closest cities near the epicenter.
| Ushuaia | 2643.4 km |
| Río Grande | 2650.0 km |
| Río Gallegos | 2845.7 km |
| Punta Arenas | 2872.4 km |
| Caleta Olivia | 3048.5 km |
| Comodoro Rivadavia | 3085.9 km |
| Mar del Plata | 3108.4 km |
| Necochea | 3126.2 km |
| Trelew | 3137.0 km |
| Puerto Madryn | 3156.6 km |
| Balcarce | 3160.2 km |
| Viedma | 3185.3 km |
Nearby earthquakes
The latest 8 earthquakes within 100 km of this epicenter.
M 4.9
South Sandwich Islands region
Unknown · 2026-09-12 11:05 UTC
63.6 km
M 5.0
South Sandwich Islands region
Unknown · 2026-09-04 06:45 UTC
33.1 km
M 5.2
South Sandwich Islands region
Unknown · 2026-09-02 10:54 UTC
73.3 km
M 5.1
South Sandwich Islands region
Unknown · 2026-08-30 03:55 UTC
80.4 km
M 4.6
South Sandwich Islands region
Unknown · 2026-07-12 15:15 UTC
90.6 km
M 4.9
South Sandwich Islands region
Unknown · 2026-06-30 15:15 UTC
88.2 km
M 4.6
South Sandwich Islands region
Unknown · 2026-06-19 03:50 UTC
5.3 km
M 4.4
South Sandwich Islands region
Unknown · 2026-06-17 20:06 UTC
50.8 km
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