3.1
Earthquake Details: 233 km ESE of Attu Station, Alaska
Aug 20, 2026, 21:50:18
A magnitude 3.1 earthquake occurred near 233 km ESE of Attu Station, Alaska on Aug 20, 2026 at 21:50:18. 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
Significance148
Latitude52.0115
Longitude176.3338
Event IDus6000tmpe
Magnitude3.1
Updated:Aug 23, 2026, 23:56:15 UTC
External Resources
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Time & depth
- Local time
- Aug 20, 2026, 21:50:18
- UTC
- Aug 20, 2026, 21:50:18 UTC
10 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby event sequence · 12
M3.6231 km ESE of Attu Station, AlaskaBeforeM3.7233 km ESE of Attu Station, AlaskaBeforeM4.0232 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, AlaskaAfterM5.1208 km ESE of Attu Station, AlaskaAfterM5.0228 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 23, 2026, 23:56 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.