3.5
Earthquake Details: 275 km ESE of Attu Station, Alaska, United States
8/18/2026, 8:31:46 AM
A magnitude 3.5 earthquake occurred near 275 km ESE of Attu Station, Alaska, United States on 8/18/2026 at 8:31:46 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
Significance188
Latitude51.9180
Longitude176.9310
Event IDaka2026qhqbyh
Magnitude3.5
Updated:8/18/2026, 9:19:09 AM
External Resources
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Time & depth
- Local time
- 8/18/2026, 8:31:46 AM
- UTC
- 8/18/2026, 8:31:46 AM UTC
10 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby event sequence · 12
M3.4239 km ESE of Attu Station, Alaska, United StatesBeforeM3.0278 km ESE of Attu Station, Alaska, United StatesBeforeM3.0276 km ESE of Attu Station, Alaska, United StatesBeforeM3.0277 km ESE of Attu Station, Alaska, United StatesBeforeM3.2274 km ESE of Attu Station, Alaska, United StatesBeforeM3.2229 km ESE of Attu Station, Alaska, United StatesBeforeM3.3232 km ESE of Attu Station, Alaska, United StatesBeforeM3.3231 km ESE of Attu Station, Alaska, United StatesAfterM2.9276 km ESE of Attu Station, Alaska, United StatesAfterM3.0280 km ESE of Attu Station, Alaska, United StatesAfterM3.3275 km ESE of Attu Station, Alaska, United StatesAfterM3.2275 km ESE of Attu Station, Alaska, United StatesAfter
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 18, 2026, 09:19 AM 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.