4.0
Earthquake Details: 169 km S of False Pass, Alaska, United States
Oct 22, 2026, 21:42:21
- Depth
- 10 km
- Felt reports
- No data
Source: USGSUpdated: Oct 23, 2026, 12:29 AM UTC
A magnitude 4.0 earthquake occurred on Oct 22, 2026 at 21:42:21. Epicenter: 169 km S of False Pass, Alaska, United States. Reported depth: 10 km.
Tsunami information
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Time & depth
- Local time
- Oct 22, 2026, 10:42:21 GMT-11
- UTC
- Oct 22, 2026, 21:42:21 UTC
10 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
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Nearby major cities
Nearby earthquakes · 12
M2.325 km W of Ivanof Bay, AlaskaBeforeM5.081 km S of Sand Point, AlaskaBeforeM4.0195 km SE of Akutan, AlaskaBeforeM4.5158 km S of False Pass, AlaskaBeforeM3.2159 km S of False Pass, AlaskaBeforeM3.3151 km S of False Pass, AlaskaBeforeM2.342 km SSW of Nikolski, AlaskaBeforeM2.26 km W of Chignik Lake, AlaskaBeforeM3.9203 km SSE of King Cove, AlaskaBeforeM3.244 km SW of Sand Point, AlaskaAfterM4.299 km SSE of Sand Point, AlaskaAfterM3.740 km SSE of Nikolski, AlaskaAfter
Agency measurements
Agencies may use different observations and magnitude scales, and initial estimates can change.
- USGSM 4
us6000u47r
- Depth:
- 10 km
- Time:
- Updated:
- Oct 23, 2026, 12:29 AM UTC
Technical Details
Depth10 km
Significance246
Latitude53.3354
Longitude-163.5539
Event IDus6000u47r
Magnitude4.0
Updated:Oct 23, 2026, 00:29:32 UTC
Regional Seismicity
External Resources
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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 23, 2026, 00:29 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).