3.4
Earthquake Details: 235 km ESE of Attu Station, Alaska
Aug 21, 2026, 01:49:29
A magnitude 3.4 earthquake occurred near 235 km ESE of Attu Station, Alaska on Aug 21, 2026 at 01:49:29. The seismic event was recorded at a depth of 32.36 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Technical Details
Depth32.36 km
Significance178
Latitude52.0089
Longitude176.3593
Event IDus6000tmds
Magnitude3.4
Updated:Aug 21, 2026, 23:46:05 UTC
External Resources
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Time & depth
- Local time
- Aug 21, 2026, 01:49:29
- UTC
- Aug 21, 2026, 01:49:29 UTC
32.36 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby event sequence · 12
M4.0232 km ESE of Attu Station, AlaskaAfterM4.0231 km ESE of Attu Station, AlaskaAfterM3.7236 km ESE of Attu Station, AlaskaAfterM3.8234 km ESE of Attu Station, AlaskaAfterM4.3261 km ESE of Attu Station, AlaskaAfterM4.0263 km ESE of Attu Station, AlaskaAfterM3.6234 km ESE of Attu Station, AlaskaAfterM5.1208 km ESE of Attu Station, AlaskaAfterM5.0228 km ESE of Attu Station, AlaskaAfterM3.6233 km ESE of Attu Station, AlaskaAfterM3.9233 km ESE of Attu Station, AlaskaAfterM3.9229 km ESE of Attu Station, AlaskaAfter
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 21, 2026, 23:46 UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0. CC BY 4.0
- JMA — Source: Japan Meteorological Agency (JMA).
- Geoscience Australia — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies. CC BY 4.0
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.