4.0
Earthquake Details: 81 km SSW of Nikolski, Alaska
Sep 26, 2026, 21:31:20
A magnitude 4.0 earthquake occurred near 81 km SSW of Nikolski, Alaska on Sep 26, 2026 at 21:31:20. The seismic event was recorded at a depth of 35 km. No tsunami warning was issued.
No Tsunami WarningStatus: ReviewedType: Earthquake
Regional Seismicity
View recent seismic activity near this event:
Technical Details
Depth35 km
Significance246
Latitude52.2872
Longitude-169.4239
Event IDus6000txwq
Magnitude4.0
Updated:Sep 27, 2026, 21:19:11 UTC
External Resources
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Time & depth
- Local time
- Sep 26, 2026, 21:31:20
- UTC
- Sep 26, 2026, 21:31:20 UTC
35 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
Nearby event sequence · 10
M3.8151 km S of False Pass, AlaskaBeforeM3.5119 km ESE of Nikolski, AlaskaBeforeM3.5158 km SW of Nikolski, AlaskaBeforeM3.7155 km SW of Nikolski, AlaskaBeforeM3.8136 km SW of Nikolski, AlaskaBeforeM3.5123 km S of False Pass, AlaskaBeforeM4.485 km SSW of Nikolski, AlaskaBeforeM3.325 km E of Atka, AlaskaAfterM3.578 km SSW of Atka, AlaskaAfterM3.573 km SSW of Atka, 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: Sep 27, 2026, 21:19 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.