4.2
Earthquake Details: 161 km SSE of Atka, Alaska
Oct 27, 2026, 21:07:28
- Depth
- 10 km
- Felt reports
- No data
Source: USGSUpdated: Oct 28, 2026, 01:10 AM UTC
A magnitude 4.2 earthquake occurred on Oct 27, 2026 at 21:07:28. Epicenter: 161 km SSE of Atka, Alaska. Reported depth: 10 km.
Tsunami information
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Time & depth
- Local time
- Oct 27, 2026, 09:07:28 GMT-12
- UTC
- Oct 27, 2026, 21:07:28 UTC
10 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
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Agency measurements
Agencies may use different observations and magnitude scales, and initial estimates can change.
- USGSM 4.2
us7000ttju
- Depth:
- 10 km
- Time:
- Updated:
- Oct 28, 2026, 01:10 AM UTC
Technical Details
Depth10 km
Significance271
Latitude50.8055
Longitude-173.5396
Event IDus7000ttju
Magnitude4.2
Updated:Oct 28, 2026, 01:10:26 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: Oct 28, 2026, 01:10 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).