3.8

Earthquake Details: 86 km SSW of Unalaska, Alaska

Oct 18, 2026, 08:02:43

Depth
39.8 km
Felt reports
No data
Source: USGSUpdated: Oct 18, 2026, 08:22 AM UTC

A magnitude 3.8 earthquake occurred on Oct 18, 2026 at 08:02:43. Epicenter: 86 km SSW of Unalaska, Alaska. Reported depth: 39.8 km.

Tsunami information

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Time & depth

Local time
Oct 17, 2026, 21:02:43 GMT-11
UTC
Oct 18, 2026, 08:02:43 UTC
39.8 km · Shallow-focus

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

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Nearby earthquakes · 9
M4.7114 km SSW of Nikolski, AlaskaBeforeM3.195 km SSE of Akutan, AlaskaBeforeM2.272 km WSW of Nikolski, AlaskaBeforeM3.735 km SW of False Pass, AlaskaBeforeM2.698 km S of Sand Point, AlaskaBeforeM2.4109 km SSE of False Pass, AlaskaBeforeM2.280 km S of Unalaska, AlaskaBeforeM3.072 km SE of Akutan, AlaskaBeforeM2.395 km SSW of Unalaska, AlaskaAfter

Agency measurements

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

  • USGSM 3.8

    us6000u34h

    Depth:
    39.8 km
    Time:
    Updated:
    Oct 18, 2026, 08:22 AM UTC

Technical Details

Depth39.8 km
Significance222
Latitude53.1507
Longitude-167.0050
Event IDus6000u34h
Magnitude3.8
Updated:Oct 18, 2026, 08:22:30 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, 08:22 UTC.

Data sources: