M5.5 earthquake South Sandwich Islands region
A magnitude 5.5 earthquake struck South Sandwich Islands region at Oct 11, 4:06 AM ET, 51 km deep, moderate – felt widely, some damage to weak buildings.
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| Magnitude | 5.5 mb |
| Time | 11 Oct 2025, 08:06 UTC |
| Location | -56.200°, -26.389° – South Sandwich Islands region |
| Depth | 51.0 km |
| Felt reports | 0 |
| Max. estimated intensity (MMI) | 3.5 |
| PAGER alert | green |
| USGS event | us6000rgil |
Other earthquakes nearby this year
| Mag. | Where | When (ET) | Depth | Felt |
|---|---|---|---|---|
| 6.2 | South Sandwich Islands region · PAGER green | Sep 2, 7:46 PM 44 d ago | 111 km | 2 reports |
| 5.7 | South Sandwich Islands region · PAGER green | May 20, 7:00 PM 149 d ago | 101 km | – |
| 5.6 | South Sandwich Islands region · PAGER green | Oct 11, 9:07 AM 370 d ago | 45 km | – |
| 5.3 | South Sandwich Islands region | Sep 2, 6:54 AM 44 d ago | 99 km | – |
| 5.2 | South Sandwich Islands region | Oct 31, 9:51 PM 350 d ago | 10 km | – |
| 5.1 | South Sandwich Islands region | Jul 29, 6:30 AM 79 d ago | 51 km | – |
| 5.1 | South Sandwich Islands region | Jun 29, 8:15 PM 109 d ago | 35 km | – |
| 5.1 | South Sandwich Islands region | Nov 3, 10:20 PM 347 d ago | 19 km | – |
| 5.1 | South Sandwich Islands region | Oct 25, 1:35 PM 356 d ago | 80 km | – |
| 5.1 | South Sandwich Islands region | Oct 23, 9:26 PM 358 d ago | 106 km | – |
| 5.0 | South Sandwich Islands region | Sep 4, 2:45 AM 43 d ago | 10 km | – |
| 5.0 | South Sandwich Islands region | Aug 29, 11:55 PM 48 d ago | 142 km | – |
About this earthquake
How strong was the South Sandwich Islands region earthquake?
Magnitude 5.5 (mb), moderate – felt widely, some damage to weak buildings. Depth 51 km. Strongest estimated shaking: intensity 3.5 on the Modified Mercalli scale.
Was it felt?
No felt reports have been submitted to the USGS so far.
Were there aftershocks?
2 earthquakes within 100 km in the following two weeks are in our records, the strongest M5.6.
More
Source: U.S. Geological Survey (USGS) earthquake catalog, real-time feeds and FDSN event service; magnitudes and locations are revised by seismologists for hours after an event. Times are Eastern (ET) unless marked UTC. Not an alert service: for warnings follow local authorities and tsunami centers.