| Magnitude | 5.5 |
| Alert | Strong |
| Depth | 10.0 km |
| Coordinates | -59.552, -26.413 |
| UTC time | 1978-12-04 19:59:10.800 |
Earthquake details
Monday, December 4, 1978 Earthquake
The earthquake hit South Sandwich Islands region on Monday, December 4, 1978 at 19:59 UTC with a magnitude of 5.5. The closest known location in the current dataset is Ushuaia, about 2537.5 km away. The epicenter is located at longitude -26.413 and latitude -59.552.
| Location | South Sandwich Islands region |
| Country | South Sandwich Islands region |
| Severity | Strong |
Earthquake map 1978-12-04
Closest countries
The 12 closest cities near the epicenter.
| Ushuaia | 2537.5 km |
| Río Grande | 2560.6 km |
| Río Gallegos | 2777.8 km |
| Punta Arenas | 2777.9 km |
| Caleta Olivia | 3049.3 km |
| Comodoro Rivadavia | 3093.0 km |
| Trelew | 3183.9 km |
| Puerto Madryn | 3209.7 km |
| Mar del Plata | 3255.6 km |
| Necochea | 3260.2 km |
| Viedma | 3269.9 km |
| Balcarce | 3303.1 km |
Nearby earthquakes
The latest 8 earthquakes within 100 km of this epicenter.
M 5.0
South Sandwich Islands region
Unknown · 2026-09-27 21:13 UTC
62.3 km
M 5.1
South Sandwich Islands region
Unknown · 2026-09-12 00:55 UTC
96.2 km
M 5.4
South Sandwich Islands region
Unknown · 2026-08-21 13:06 UTC
78.4 km
M 4.9
South Sandwich Islands region
Unknown · 2026-07-21 08:53 UTC
57.3 km
M 4.8
South Sandwich Islands region
Unknown · 2026-07-18 16:57 UTC
15.8 km
M 4.6
South Sandwich Islands region
Unknown · 2026-07-17 18:24 UTC
15.4 km
M 4.8
South Sandwich Islands region
Unknown · 2026-07-15 15:36 UTC
10.1 km
M 4.2
South Sandwich Islands region
Unknown · 2026-07-13 11:05 UTC
99.2 km
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