| Magnitude | 5.5 |
| Alert | Strong |
| Depth | 57.5 km |
| Coordinates | -56.573, -25.325 |
| UTC time | 1991-12-28 15:59:47.100 |
Earthquake details
Saturday, December 28, 1991 Earthquake
The earthquake hit South Sandwich Islands region on Saturday, December 28, 1991 at 15:59 UTC with a magnitude of 5.5. The closest known location in the current dataset is Ushuaia, about 2660.1 km away. The epicenter is located at longitude -25.325 and latitude -56.573.
| Location | South Sandwich Islands region |
| Country | South Sandwich Islands region |
| Severity | Strong |
Earthquake map 1991-12-28
Closest countries
The 12 closest cities near the epicenter.
| Ushuaia | 2660.1 km |
| Río Grande | 2668.3 km |
| Río Gallegos | 2866.1 km |
| Punta Arenas | 2890.3 km |
| Caleta Olivia | 3074.4 km |
| Comodoro Rivadavia | 3112.3 km |
| Mar del Plata | 3142.9 km |
| Necochea | 3160.1 km |
| Trelew | 3166.2 km |
| Puerto Madryn | 3186.1 km |
| Balcarce | 3194.5 km |
| Viedma | 3216.8 km |
Nearby earthquakes
The latest 8 earthquakes within 100 km of this epicenter.
M 5.0
South Sandwich Islands region
Unknown · 2026-09-21 21:37 UTC
84.1 km
M 4.9
South Sandwich Islands region
Unknown · 2026-09-12 11:05 UTC
92.7 km
M 5.0
South Sandwich Islands region
Unknown · 2026-09-04 06:45 UTC
69.6 km
M 5.2
South Sandwich Islands region
Unknown · 2026-09-02 10:54 UTC
98.9 km
M 4.8
South Sandwich Islands region
Unknown · 2026-07-14 15:25 UTC
68.4 km
M 4.6
South Sandwich Islands region
Unknown · 2026-06-19 03:50 UTC
34.0 km
M 4.4
South Sandwich Islands region
Unknown · 2026-06-17 20:06 UTC
80.2 km
M 4.3
South Sandwich Islands region
Unknown · 2026-06-16 19:27 UTC
99.7 km
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