3.5
Earthquake Details: 227 km SSE of Atka, Alaska
Oct 31, 2026, 16:41:34
- Depth
- 10 km
- Felt reports
- No data
Source: USGSUpdated: Nov 3, 2026, 05:59 PM UTC
A magnitude 3.5 earthquake occurred on Oct 31, 2026 at 16:41:34. Epicenter: 227 km SSE of Atka, Alaska. Reported depth: 10 km.
Status: Reviewed
Tsunami information
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Time & depth
- Local time
- Oct 31, 2026, 04:41:34 GMT-12
- UTC
- Oct 31, 2026, 16:41:34 UTC
10 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
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Nearby earthquakes · 11
M2.8148 km SW of Adak, AlaskaAfterM3.6115 km SW of Nikolski, AlaskaAfterM3.8115 km SW of Nikolski, AlaskaAfterM3.2120 km SW of Nikolski, AlaskaAfterM3.2120 km SW of Nikolski, AlaskaAfterM3.5117 km SW of Nikolski, AlaskaAfterM3.4120 km SW of Nikolski, AlaskaAfterM2.117 km W of Adak, AlaskaAfterM3.287 km NE of Adak, AlaskaAfterM2.163 km W of Nikolski, AlaskaAfterM2.367 km W of Nikolski, AlaskaAfter
Agency measurements
Agencies may use different observations and magnitude scales, and initial estimates can change.
- USGSml 3.5
us7000tuvb
- Depth:
- 10 km
- Status:
- Reviewed
- Time:
- Updated:
- Nov 3, 2026, 05:59 PM UTC
Technical Details
Depth10 km
Significance188
Latitude50.2365
Longitude-173.2876
Event IDus7000tuvb
Magnitude3.5
Updated:Nov 3, 2026, 17:59:12 UTC
Regional Seismicity
View recent seismic activity near this event:
External Resources
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: Nov 3, 2026, 17:59 UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under 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.
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.
- CENC / Wolfx — CENC earthquake parameters via Wolfx, an independent unofficial relay.
- GFZ / GEOFON — Locations, depths and magnitudes: GFZ/GEOFON using GEVN network data (CC BY 4.0).