| Magnitude | 5.6 |
| Alert | Strong |
| Depth | 82.0 km |
| Coordinates | -56.531, -25.745 |
| UTC time | 1977-09-17 08:20:09.300 |
Earthquake details
Saturday, September 17, 1977 Earthquake
The earthquake hit South Sandwich Islands region on Saturday, September 17, 1977 at 08:20 UTC with a magnitude of 5.6. The closest known location in the current dataset is Ushuaia, about 2636.3 km away. The epicenter is located at longitude -25.745 and latitude -56.531.
| 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 | 2636.3 km |
| Río Grande | 2644.0 km |
| Río Gallegos | 2841.1 km |
| Punta Arenas | 2866.1 km |
| Caleta Olivia | 3048.4 km |
| Comodoro Rivadavia | 3086.3 km |
| Mar del Plata | 3117.9 km |
| Necochea | 3134.8 km |
| Trelew | 3140.0 km |
| Puerto Madryn | 3160.0 km |
| Balcarce | 3169.4 km |
| Viedma | 3190.7 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
66.9 km
M 5.0
South Sandwich Islands region
Unknown · 2026-09-04 06:45 UTC
49.2 km
M 5.2
South Sandwich Islands region
Unknown · 2026-09-02 10:54 UTC
72.7 km
M 5.1
South Sandwich Islands region
Unknown · 2026-08-30 03:55 UTC
77.7 km
M 4.8
South Sandwich Islands region
Unknown · 2026-07-14 15:25 UTC
86.8 km
M 4.9
South Sandwich Islands region
Unknown · 2026-06-30 15:15 UTC
96.5 km
M 4.6
South Sandwich Islands region
Unknown · 2026-06-19 03:50 UTC
24.5 km
M 4.4
South Sandwich Islands region
Unknown · 2026-06-17 20:06 UTC
74.1 km
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