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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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3.4

50 km S of Shishmaref, Alaska

18 October 2026, 07:54:43 (+03) 2026-10-18 04:54:43 UTC

2 sources: EMSC, USGS ml
Did you feel this earthquake?
Magnitude
3.4 ml
Depth
10.0 km
Coordinates
65.8000, -166.0950
Data consistency
90/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
0
Last 30 days
1

Approximate energy released

≈ 1.9 t TNT

7.94e+9 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

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

1 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 0
  • M3 1
  • M4 0
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 0
  • 10–20 km 1
  • 20–40 km 0
  • 40–70 km 0
  • 70–150 km 0
  • 150+ km 0

Largest previous earthquakes within 100 km

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

No records.

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
NORTHERN ALASKA
 3.4 ml 10.0 km 04:54:43.349 Δt 0 sn · 0 km · ΔM 0 Original record
USGS Earthquake Hazards Program Displayed
50 km S of Shishmaref, Alaska
 3.4 ml 10.0 km 04:54:43.348 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. 18.10.2026 11:10:31 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  2. 18.10.2026 11:08:28 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  3. 18.10.2026 11:06:24 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  4. 18.10.2026 11:03:17 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  5. 18.10.2026 11:01:11 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  6. 18.10.2026 10:57:53 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  7. 18.10.2026 10:46:17 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  8. 18.10.2026 10:44:12 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  9. 18.10.2026 10:43:04 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  10. 18.10.2026 10:39:55 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  11. 18.10.2026 10:36:48 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  12. 18.10.2026 10:35:45 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  13. 18.10.2026 10:29:28 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  14. 18.10.2026 10:28:22 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  15. 18.10.2026 10:26:18 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  16. 18.10.2026 10:22:01 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  17. 18.10.2026 10:21:00 · EMSC · update

    time: 2026-10-18T04:54:43.349+00:00 → 2026-10-18T04:54:43.348+00:00

  18. 18.10.2026 10:10:36 · SISTEM · recompute

    time: 2026-10-18T04:54:43.349Z → 2026-10-18 04:54:43.348+00:00 source count: 1 → 2 review status: automatic → reviewed confirming sources: emsc → emsc,usgs preferred source: 3 → 4

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