3.4
Earthquake Details: 91 km SSW of Unalaska, Alaska, United States
8/18/2026, 1:05:16 PM
A magnitude 3.4 earthquake occurred near 91 km SSW of Unalaska, Alaska, United States on 8/18/2026 at 1:05:16 PM. The seismic event was recorded at a depth of 29.1 km. No tsunami warning was issued.
No Tsunami WarningStatus: reviewedType: earthquake
Technical Details
Depth29.1 km
Significance178
Latitude53.0730
Longitude-166.8450
Event IDaka2026qhzeww
Magnitude3.4
Updated:8/18/2026, 6:11:02 PM
External Resources
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Time & depth
- Local time
- 8/18/2026, 1:05:16 PM
- UTC
- 8/18/2026, 1:05:16 PM UTC
29.1 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby event sequence · 12
M2.761 km SSW of Unalaska, Alaska, United StatesBeforeM2.860 km SSW of Unalaska, Alaska, United StatesBeforeM3.0163 km SW of Nikolski, Alaska, United StatesBeforeM2.9161 km SW of Nikolski, Alaska, United StatesBeforeM2.9189 km SE of Akutan, Alaska, United StatesBeforeM3.177 km W of Nikolski, Alaska, United StatesBeforeM2.7110 km SSE of False Pass, Alaska, United StatesBeforeM3.292 km SSE of Sand Point, Alaska, United StatesBeforeM2.692 km SE of Atka, Alaska, United StatesBeforeM3.293 km SE of King Cove, Alaska, United StatesBeforeM3.389 km SE of King Cove, Alaska, United StatesBeforeM3.487 km SSW of Unalaska, Alaska, United StatesBefore
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, 06:11 PM 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.