How strong was the 47 km SE of Adak, Alaska earthquake?
The 47 km SE of Adak, Alaska earthquake had a magnitude of 4.9 mww, classified as a "Light" earthquake on the magnitude scale. Earthquakes of this magnitude are typically felt by people nearby but rarely cause significant structural damage.
Where exactly did this earthquake occur and how deep was it?
This earthquake struck at coordinates 51.5796N, 176.1333W, at a depth of 56.5 km. This intermediate depth can still produce significant shaking at the surface.
Did this earthquake trigger a tsunami warning?
No tsunami warning was issued for this earthquake. Earthquakes below magnitude 6.5 rarely generate dangerous tsunamis, though localized effects are possible in rare cases.
How many people felt this earthquake?
1 people submitted felt reports to the USGS for this earthquake. The Community Decimal Intensity (CDI) reached 4.1, indicating moderate shaking felt by most people indoors. The Modified Mercalli Intensity (MMI) was estimated at 3.5.
When did this earthquake happen and how significant was it?
This earthquake occurred on October 25, 2025 at 19:13:06. The USGS assigned it a significance score of 370 out of a possible 3,000, which factors in magnitude, felt reports, and potential impact. This is a relatively routine seismic event.