3.4

Earthquake Details: 217 km SSE of Atka, Alaska

Oct 17, 2026, 08:11:43

Depth
10 km
Felt reports
No data
Source: USGSUpdated: Oct 18, 2026, 04:33 AM UTC

A magnitude 3.4 earthquake occurred on Oct 17, 2026 at 08:11:43. Epicenter: 217 km SSE of Atka, Alaska. Reported depth: 10 km.

Tsunami information

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Time & depth

Local time
Oct 16, 2026, 20:11:43 GMT-12
UTC
Oct 17, 2026, 08:11:43 UTC
10 km · Shallow-focus

Less than 70 km deep. Shaking is often stronger near the epicentre.

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Nearby earthquakes · 9
M3.58 km SW of Atka, AlaskaBeforeM2.6155 km W of Adak, AlaskaBeforeM4.7114 km SSW of Nikolski, AlaskaBeforeM2.272 km WSW of Nikolski, AlaskaBeforeM3.9107 km SSE of Adak, AlaskaBeforeM2.1101 km WSW of Adak, AlaskaAfterM2.2125 km WSW of Adak, AlaskaAfterM2.571 km SE of Adak, AlaskaAfterM2.4123 km W of Adak, AlaskaAfter

Agency measurements

Agencies may use different observations and magnitude scales, and initial estimates can change.

  • USGSM 3.4

    us6000u30i

    Depth:
    10 km
    Time:
    Updated:
    Oct 18, 2026, 04:33 AM UTC

Technical Details

Depth10 km
Significance178
Latitude50.3370
Longitude-173.2148
Event IDus6000u30i
Magnitude3.4
Updated:Oct 18, 2026, 04:33:47 UTC

Regional Seismicity

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External Resources

View on USGS Official Site

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 18, 2026, 04:33 UTC.

Data sources: