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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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2.9

ALASKA PENINSULA

27 September 2026, 18:42:39 (+03) 2026-09-27 15:42:39 UTC

2 sources: EMSC, USGS ml
Did you feel this earthquake?
Magnitude
2.9 ml
Depth
10.0 km
Coordinates
56.5942, -156.3408
Data consistency
85/100

Regional activity (100 km)

Last 24 hours
0
Last 7 days
5
Last 30 days
21

Approximate energy released

≈ 0.3 t TNT

1.41e+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

27 earthquakes

By magnitude

  • M0 0
  • M1 0
  • M2 21
  • M3 6
  • M4 0
  • M5 0
  • M6 0
  • M7 0
  • M8+ 0

By depth

  • 0–10 km 6
  • 10–20 km 3
  • 20–40 km 6
  • 40–70 km 6
  • 70–150 km 6
  • 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 Displayed
ALASKA PENINSULA
 2.9 ml 10.0 km 15:42:39.667 Δt 0 sn · 0 km · ΔM 0 Original record
USGS Earthquake Hazards Program
124 km SSE of Ugashik, Alaska
 2.9 ml 4.4 km 15:42:39.408 Δt 0.26 sn · 3.81 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. 27.09.2026 19:11:01 · EMSC · update

    depth: 4.4 → 10 latitude: 56.568 → 56.5942 longitude: -156.301 → -156.3408 time: 2026-09-27T15:42:39.408+00:00 → 2026-09-27T15:42:39.667+00:00

  2. 27.09.2026 19:11:01 · SISTEM · recompute

    depth: 4.4 → 10 latitude: 56.568 → 56.5942 longitude: -156.301 → -156.3408 time: 2026-09-27T15:42:39.408Z → 2026-09-27 15:42:39.667+00:00

  3. 27.09.2026 18:48:15 · USGS · update

    depth: 5.4 → 4.4 latitude: 56.574 → 56.568 longitude: -156.305 → -156.301 magnitude: 2.8 → 2.9 time: 2026-09-27T15:42:39.551+00:00 → 2026-09-27T15:42:39.408+00:00 location: 123 km SSE of Ugashik, Alaska → 124 km SSE of Ugashik, Alaska

  4. 27.09.2026 18:48:14 · EMSC · update

    depth: 5.4 → 4.4 latitude: 56.574 → 56.568 longitude: -156.305 → -156.301 magnitude: 2.8 → 2.9 time: 2026-09-27T15:42:39.551+00:00 → 2026-09-27T15:42:39.408+00:00

  5. 27.09.2026 18:48:14 · SISTEM · recompute

    depth: 5.4 → 4.4 latitude: 56.574 → 56.568 longitude: -156.305 → -156.301 magnitude: 2.8 → 2.9 time: 2026-09-27T15:42:39.551Z → 2026-09-27 15:42:39.408+00:00

  6. 27.09.2026 18:46:10 · USGS · update

    depth: 5.3 → 5.4 longitude: -156.303 → -156.305 magnitude: 2.9 → 2.8 time: 2026-09-27T15:42:39.543+00:00 → 2026-09-27T15:42:39.551+00:00

  7. 27.09.2026 18:46:09 · EMSC · update

    depth: 5.3 → 5.4 longitude: -156.303 → -156.305 magnitude: 2.9 → 2.8 time: 2026-09-27T15:42:39.544+00:00 → 2026-09-27T15:42:39.551+00:00

  8. 27.09.2026 18:46:09 · SISTEM · recompute

    depth: 5.3 → 5.4 longitude: -156.303 → -156.305 magnitude: 2.9 → 2.8 time: 2026-09-27T15:42:39.544Z → 2026-09-27 15:42:39.551+00:00

  9. 27.09.2026 18:45:07 · USGS · update

    depth: 5 → 5.3 latitude: 56.523 → 56.574 longitude: -156.244 → -156.303 magnitude: 3.1 → 2.9 time: 2026-09-27T15:42:38.294+00:00 → 2026-09-27T15:42:39.543+00:00 location: 130 km SSE of Ugashik, Alaska → 123 km SSE of Ugashik, Alaska

  10. 27.09.2026 18:45:05 · SISTEM · recompute

    depth: 5 → 5.3 latitude: 56.523 → 56.574 longitude: -156.244 → -156.303 magnitude: 3.1 → 2.9 time: 2026-09-27T15:42:38.294Z → 2026-09-27 15:42:39.544+00:00 source count: 1 → 2 confirming sources: usgs → emsc,usgs preferred source: 4 → 3

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