13 Dec 2025, 10:51 UTC · Dec 13, 5:51 AM ET · PAGER green
M5.5 earthquake Rat Islands, Aleutian Islands, Alaska
A magnitude 5.5 earthquake struck Rat Islands, Aleutian Islands, Alaska at Dec 13, 5:51 AM ET, 108 km deep, moderate – felt widely, some damage to weak buildings.
How strong was the Rat Islands, Aleutian Islands, Alaska earthquake?
Magnitude 5.5 (mww), moderate – felt widely, some damage to weak buildings. Depth 108 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?
No earthquakes within 100 km have followed so far in our records.
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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.
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M5.5 earthquake Rat Islands, Aleutian Islands, Alaska