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Significant earthquake

This summarises a recorded earthquake only; it is not a warning or a prediction. Follow AFAD and the competent authorities for official statements and guidance.

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3.8

41 km NNE of Petersville, Alaska

17 October 2026, 11:16:42 (+03) 2026-10-17 08:16:42 UTC

2 sources: EMSC, USGS ml
Did you feel this earthquake?
Magnitude
3.8 ml
Depth
91.9 km
Coordinates
62.8520, -150.5060
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
2
Last 7 days
8
Last 30 days
23

Approximate energy released

≈ 7.6 t TNT

3.16e+10 J

Approximated with the Gutenberg–Richter relation (log E = 1.5 M + 4.8); depends on magnitude type. Gutenberg & Richter (1956).

Did you feel this earthquake?

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Community reports

Based on voluntary reports from users; not an instrumental measurement or official intensity. For official information follow AFAD and Kandilli Observatory announcements.

Impact information reported by sources

  • USGS Earthquake Hazards Program Tsunami flag: No Maximum intensity (MMI): 2,3 Felt reports: 2 ShakeMap

These values are automatic products of the respective agency, not an assessment by this platform. For tsunami warnings follow the Kandilli Observatory Regional Earthquake-Tsunami Monitoring Center and AFAD.

Nearby places

No records.

Nearby faults (50 km)

No mapped fault within 50 km.

Last year, within 100 km

34 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 22
  • M3 12
  • M4 0
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 5
  • 10–20 km 2
  • 20–40 km 2
  • 40–70 km 2
  • 70–150 km 23
  • 150+ km 0

Largest previous earthquakes within 100 km

Largest earthquakes in the platform catalogue and entries from historical catalogues (with citation).

Comparison with past records

…

No earlier earthquakes are recorded in this area.

  • Source:

Where does this earthquake come from?

Source comparison

Agency Magnitude Depth Time (UTC) Difference from master Original record
EMSC-CSEM
CENTRAL ALASKA
 3.8 ml 91.9 km 08:16:42.976 Δt 0 sn · 0 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
41 km NNE of Petersville, Alaska
 3.8 ml 91.9 km 08:16:42.976 Δt 0 sn · 0 km · ΔM 0 Original record

This value summarises agreement between sources; it is not a measure of scientific accuracy. Euro-Mediterranean Seismological Centre (EMSC-CSEM) — CC BY 4.0 U.S. Geological Survey (USGS) Earthquake Hazards Program — Public domain (U.S. Government)

Revision history

  1. 17.10.2026 18:39:54 · USGS · update

    depth: 93.2 → 91.9 latitude: 62.849 → 62.852 time: 2026-10-17T08:16:42.940+00:00 → 2026-10-17T08:16:42.976+00:00 review status: automatic → reviewed

  2. 17.10.2026 18:39:54 · SISTEM · recompute

    review status: automatic → reviewed preferred source: 3 → 4

  3. 17.10.2026 18:39:53 · EMSC · update

    depth: 95.7 → 91.9 latitude: 62.8329 → 62.852 longitude: -150.5344 → -150.506 time: 2026-10-17T08:16:42.161+00:00 → 2026-10-17T08:16:42.976+00:00

  4. 17.10.2026 18:39:53 · SISTEM · recompute

    depth: 95.7 → 91.9 latitude: 62.8329 → 62.852 longitude: -150.5344 → -150.506 time: 2026-10-17T08:16:42.161Z → 2026-10-17 08:16:42.976+00:00

  5. 17.10.2026 11:34:01 · EMSC · update

    depth: 93.2 → 95.7 latitude: 62.849 → 62.8329 longitude: -150.506 → -150.5344 time: 2026-10-17T08:16:42.941+00:00 → 2026-10-17T08:16:42.161+00:00

  6. 17.10.2026 11:34:01 · SISTEM · recompute

    depth: 93.2 → 95.7 latitude: 62.849 → 62.8329 longitude: -150.506 → -150.5344 time: 2026-10-17T08:16:42.941Z → 2026-10-17 08:16:42.161+00:00

  7. 17.10.2026 11:32:49 · EMSC · update

    time: 2026-10-17T08:16:42.941+00:00 → 2026-10-17T08:16:42.940+00:00

  8. 17.10.2026 11:29:46 · EMSC · update

    time: 2026-10-17T08:16:42.941+00:00 → 2026-10-17T08:16:42.940+00:00

  9. 17.10.2026 11:28:46 · EMSC · update

    time: 2026-10-17T08:16:42.941+00:00 → 2026-10-17T08:16:42.940+00:00

  10. 17.10.2026 11:26:35 · EMSC · update

    time: 2026-10-17T08:16:42.941+00:00 → 2026-10-17T08:16:42.940+00:00

  11. 17.10.2026 11:23:26 · EMSC · update

    time: 2026-10-17T08:16:42.941+00:00 → 2026-10-17T08:16:42.940+00:00

  12. 17.10.2026 11:22:21 · EMSC · update

    time: 2026-10-17T08:16:42.941+00:00 → 2026-10-17T08:16:42.940+00:00

  13. 17.10.2026 11:20:18 · USGS · update

    depth: 93.1 → 93.2 latitude: 62.857 → 62.849 longitude: -150.535 → -150.506 magnitude: 3.7 → 3.8 time: 2026-10-17T08:16:42.824+00:00 → 2026-10-17T08:16:42.940+00:00

  14. 17.10.2026 11:20:17 · EMSC · update

    depth: 93.1 → 93.2 latitude: 62.857 → 62.849 longitude: -150.535 → -150.506 magnitude: 3.7 → 3.8 time: 2026-10-17T08:16:42.825+00:00 → 2026-10-17T08:16:42.940+00:00

  15. 17.10.2026 11:20:17 · SISTEM · recompute

    depth: 93.1 → 93.2 latitude: 62.857 → 62.849 longitude: -150.535 → -150.506 magnitude: 3.7 → 3.8 time: 2026-10-17T08:16:42.825Z → 2026-10-17 08:16:42.941+00:00

  16. 17.10.2026 11:19:16 · USGS · update

    depth: 95.3 → 93.1 latitude: 62.843 → 62.857 longitude: -150.544 → -150.535 magnitude: 3.8 → 3.7 time: 2026-10-17T08:16:42.453+00:00 → 2026-10-17T08:16:42.824+00:00 location: 40 km NNE of Petersville, Alaska → 41 km NNE of Petersville, Alaska

  17. 17.10.2026 11:19:15 · EMSC · update

    depth: 95.3 → 93.1 latitude: 62.843 → 62.857 longitude: -150.544 → -150.535 magnitude: 3.8 → 3.7 time: 2026-10-17T08:16:42.454+00:00 → 2026-10-17T08:16:42.824+00:00

  18. 17.10.2026 11:19:15 · SISTEM · recompute

    depth: 95.3 → 93.1 latitude: 62.843 → 62.857 longitude: -150.544 → -150.535 magnitude: 3.8 → 3.7 time: 2026-10-17T08:16:42.454Z → 2026-10-17 08:16:42.825+00:00

  19. 17.10.2026 11:18:10 · SISTEM · recompute

    source count: 1 → 2 confirming sources: emsc → emsc,usgs

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