4.2
Earthquake Details: Rat Islands, Aleutian Islands, Alaska, United States
8/20/2026, 2:45:04 AM
A magnitude 4.2 earthquake occurred near Rat Islands, Aleutian Islands, Alaska, United States on 8/20/2026 at 2:45:04 AM. The seismic event was recorded at a depth of 18.5 km. No tsunami warning was issued.
No Tsunami WarningStatus: reviewedType: earthquake
Technical Details
Depth18.5 km
Significance271
Latitude50.9530
Longitude178.7160
Event IDaka2026qkwoge
Magnitude4.2
Updated:8/20/2026, 3:50:07 AM
External Resources
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Time & depth
- Local time
- 8/20/2026, 2:45:04 AM
- UTC
- 8/20/2026, 2:45:04 AM UTC
18.5 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby event sequence · 12
M3.2274 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 StatesBeforeM3.5275 km ESE of Attu Station, Alaska, United StatesBeforeM3.3231 km ESE of Attu Station, Alaska, United StatesBeforeM3.3275 km ESE of Attu Station, Alaska, United StatesBeforeM3.2275 km ESE of Attu Station, Alaska, United StatesBeforeM3.7275 km ESE of Attu Station, Alaska, United StatesBeforeM3.7Rat Islands, Aleutian Islands, Alaska, United StatesBeforeM3.9Rat Islands, Aleutian Islands, Alaska, United StatesBeforeM3.5216 km SSE of Attu Station, Alaska, United StatesBeforeM3.1234 km ESE of Attu Station, 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 20, 2026, 03:50 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.