M5.5 earthquake Pacific-Antarctic Ridge
A magnitude 5.5 earthquake struck Pacific-Antarctic Ridge at Dec 3, 10:12 PM ET, 10 km deep, moderate – felt widely, some damage to weak buildings.
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| Magnitude | 5.5 mww |
| Time | 4 Dec 2025, 03:12 UTC |
| Location | -55.382°, -128.103° – Pacific-Antarctic Ridge |
| Depth | 10.0 km |
| Felt reports | 0 |
| Max. estimated intensity (MMI) | 0.0 |
| PAGER alert | green |
| USGS event | us7000rfg1 |
Other earthquakes nearby this year
| Mag. | Where | When (ET) | Depth | Felt |
|---|---|---|---|---|
| 5.9 | Pacific-Antarctic Ridge · PAGER green | Apr 6, 7:18 AM 193 d ago | 10 km | – |
| 5.6 | Pacific-Antarctic Ridge | Nov 9, 10:21 AM 341 d ago | 10 km | – |
| 5.4 | Pacific-Antarctic Ridge · PAGER green | Apr 7, 5:07 AM 192 d ago | 10 km | – |
| 5.1 | southern East Pacific Rise | Dec 6, 10:12 AM 314 d ago | 10 km | – |
| 5.1 | Pacific-Antarctic Ridge | Dec 3, 10:14 PM 317 d ago | 10 km | – |
| 4.5 | Pacific-Antarctic Ridge | May 22, 12:42 AM 148 d ago | 10 km | – |
About this earthquake
How strong was the Pacific-Antarctic Ridge earthquake?
Magnitude 5.5 (mww), moderate – felt widely, some damage to weak buildings. Depth 10 km.
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 M5.1.
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.