| Magnitude | 5.1 |
| Alert | Strong |
| Depth | 33.0 km |
| Coordinates | -55.206, -28.880 |
| UTC time | 1977-10-09 22:00:42.800 |
Earthquake details
Sunday, October 9, 1977 Earthquake
The earthquake hit South Sandwich Islands region on Sunday, October 9, 1977 at 22:00 UTC with a magnitude of 5.1. The closest known location in the current dataset is Río Grande, about 2482.6 km away. The epicenter is located at longitude -28.880 and latitude -55.206.
| Location | South Sandwich Islands region |
| Country | South Sandwich Islands region |
| Severity | Strong |
Earthquake map 1977-10-09
Closest countries
The 12 closest cities near the epicenter.
| Río Grande | 2482.6 km |
| Ushuaia | 2484.1 km |
| Río Gallegos | 2667.4 km |
| Punta Arenas | 2706.0 km |
| Caleta Olivia | 2843.5 km |
| Mar del Plata | 2875.3 km |
| Comodoro Rivadavia | 2878.8 km |
| Necochea | 2893.8 km |
| Trelew | 2918.8 km |
| Balcarce | 2927.3 km |
| Puerto Madryn | 2936.9 km |
| Viedma | 2959.2 km |
Nearby earthquakes
The latest 8 earthquakes within 100 km of this epicenter.
M 4.8
South Sandwich Islands region
Unknown · 2026-09-29 06:38 UTC
27.0 km
M 4.8
South Sandwich Islands region
Unknown · 2026-09-29 04:16 UTC
44.2 km
M 5.0
South Sandwich Islands region
Unknown · 2026-09-19 09:59 UTC
67.3 km
M 6.4
South Sandwich Islands region
Unknown · 2026-07-11 10:26 UTC
36.6 km
M 4.9
South Sandwich Islands region
Unknown · 2026-04-02 20:22 UTC
53.4 km
M 4.9
South Sandwich Islands region
Unknown · 2026-03-01 03:41 UTC
89.1 km
M 4.5
South Sandwich Islands region
Unknown · 2026-01-18 12:48 UTC
90.7 km
M 5.4
South Sandwich Islands region
Unknown · 2026-01-17 18:00 UTC
65.0 km
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