Update: Earthquake of 5.5 magnitude reported near Pacific-Antarctic Ridge on Dec. 4

Published Dec 20, 2025

Thursday afternoon, a 5.5 magnitude quake was recorded close to Pacific-Antarctic Ridge, according to the U.S. Geological Survey.

The tremor shook at 03:12 UTC (18:12 local time), with its epicenter situated of Pacific-Antarctic Ridge and a depth of 10 km. Seismologists first reported it as a 5.3 event, but later upgraded it to 5.5.

Did you feel it?

If you felt the earthquake, you can share your observations using the USGS Felt Report form.

Impact and estimated losses

Green alert for shaking-related fatalities and economic losses. There is a low likelihood of casualties and damage.

Structure information summary
There are likely to be no affected structures in this region.

Source: The U.S. Geological Survey