| Magnitude | 5.1 |
| Alert | Strong |
| Depth | 33.0 km |
| Coordinates | -56.378, -25.881 |
| UTC time | 1977-09-16 21:35:05.900 |
Earthquake details
Friday, September 16, 1977 Earthquake
The earthquake hit South Sandwich Islands region on Friday, September 16, 1977 at 21:35 UTC with a magnitude of 5.1. The closest known location in the current dataset is Ushuaia, about 2632.3 km away. The epicenter is located at longitude -25.881 and latitude -56.378.
| Location | South Sandwich Islands region |
| Country | South Sandwich Islands region |
| Severity | Strong |
Earthquake map 1977-09-16
Closest countries
The 12 closest cities near the epicenter.
| Ushuaia | 2632.3 km |
| Río Grande | 2639.1 km |
| Río Gallegos | 2835.1 km |
| Punta Arenas | 2861.4 km |
| Caleta Olivia | 3039.0 km |
| Comodoro Rivadavia | 3076.6 km |
| Mar del Plata | 3102.6 km |
| Necochea | 3119.9 km |
| Trelew | 3128.5 km |
| Puerto Madryn | 3148.2 km |
| Balcarce | 3154.2 km |
| Viedma | 3177.7 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
54.3 km
M 5.0
South Sandwich Islands region
Unknown · 2026-09-04 06:45 UTC
30.4 km
M 5.2
South Sandwich Islands region
Unknown · 2026-09-02 10:54 UTC
63.0 km
M 5.1
South Sandwich Islands region
Unknown · 2026-08-30 03:55 UTC
69.6 km
M 4.6
South Sandwich Islands region
Unknown · 2026-07-12 15:15 UTC
87.1 km
M 4.9
South Sandwich Islands region
Unknown · 2026-06-30 15:15 UTC
81.2 km
M 4.6
South Sandwich Islands region
Unknown · 2026-06-19 03:50 UTC
16.5 km
M 4.4
South Sandwich Islands region
Unknown · 2026-06-17 20:06 UTC
59.0 km
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