Earthquake Details: 240 km ESE of Attu Station, Alaska, United States

8/13/2026, 1:46:44 AM

A magnitude 3.4 earthquake occurred near 240 km ESE of Attu Station, Alaska, United States on 8/13/2026 at 1:46:44 AM. The seismic event was recorded at a depth of 10 km. No tsunami warning was issued.

No Tsunami WarningStatus: reviewedType: earthquake

Technical Details

Depth10 km

Significance178

Latitude51.8674

Longitude176.3382

Event IDus6000tke7

Magnitude3.4

Updated:8/13/2026, 10:03:08 PM

External Resources

View on USGS Official Site

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Time & depth

Local time: 8/13/2026, 1:46:44 AM
UTC: 8/13/2026, 1:46:44 AM UTC

10 km · Shallow-focus

Less than 70 km deep. Shaking is often stronger near the epicentre.

Nearby event sequence · 6

M3.2233 km ESE of Attu Station, Alaska, United StatesBefore8/12/2026, 3:03:03 AM M3.0Rat Islands, Aleutian Islands, Alaska, United StatesBefore8/12/2026, 9:16:23 PM M2.5Rat Islands, Aleutian Islands, Alaska, United StatesAfter8/13/2026, 8:22:33 AM M2.8Rat Islands, Aleutian Islands, Alaska, United StatesAfter8/13/2026, 10:12:50 AM M3.3232 km ESE of Attu Station, Alaska, United StatesAfter8/14/2026, 1:58:14 AM M2.6Rat Islands, Aleutian Islands, Alaska, United StatesAfter8/15/2026, 3:57:58 AM

Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Aug 13, 2026, 10:03 PM UTC. Data sources: USGS / EMSC / JMA / Geoscience Australia / GeoNet.