4.0
Earthquake Details: 263 km ESE of Attu Station, Alaska
Aug 23, 2026, 07:51:04
A magnitude 4.0 earthquake occurred near 263 km ESE of Attu Station, Alaska on Aug 23, 2026 at 07:51:04. The seismic event was recorded at a depth of 34.17 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Technical Details
Depth34.17 km
Significance246
Latitude51.6929
Longitude176.5608
Event IDus6000tn08
Magnitude4.0
Updated:Aug 27, 2026, 21:47:01 UTC
External Resources
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Time & depth
- Local time
- Aug 23, 2026, 07:51:04
- UTC
- Aug 23, 2026, 07:51:04 UTC
34.17 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, AlaskaBeforeM4.0231 km ESE of Attu Station, AlaskaBeforeM3.7236 km ESE of Attu Station, AlaskaBeforeM3.8234 km ESE of Attu Station, AlaskaBeforeM4.3261 km ESE of Attu Station, AlaskaBeforeM3.6234 km ESE of Attu Station, AlaskaAfterM3.5236 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 27, 2026, 21:47 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.