3.4
Earthquake Details: 70 km SSE of Adak, Alaska
Aug 21, 2026, 01:08:12
A magnitude 3.4 earthquake occurred near 70 km SSE of Adak, Alaska on Aug 21, 2026 at 01:08:12. The seismic event was recorded at a depth of 6.43 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
View recent seismic activity near this event:
Technical Details
Depth6.43 km
Significance178
Latitude51.2868
Longitude-176.2539
Event IDus6000tmdn
Magnitude3.4
Updated:Aug 21, 2026, 23:56:40 UTC
External Resources
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Time & depth
- Local time
- Aug 21, 2026, 01:08:12
- UTC
- Aug 21, 2026, 01:08:12 UTC
6.43 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
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, 23:56 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.