30 km S of Adak, Alaska
4 November 2026, 22:22:20 (+03) 2026-11-04 19:22:20 UTC
- Magnitude
- 4.2 mb
- Depth
- 74.5 km
- Coordinates
- 51.5984, -176.6581
- Data consistency
- 90/100
Regional activity (100 km)
- Last 24 hours
- 0
- Last 7 days
- 6
- Last 30 days
- 39
Approximate energy released
≈ 30 t TNT
1.26e+11 J
Approximated with the Gutenberg–Richter relation (log E = 1.5 M + 4.8); depends on magnitude type. Gutenberg & Richter (1956).
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Community reports
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- Community intensity
- Typical duration
- Farthest report
- felt it
Estimated, close to the MMI scale
Intensity distribution
Provinces with reports
Reported effects
Squares on the map show community reports (~11 km grid; colour = estimated intensity).
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): 2,8 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
42 earthquakes
By magnitude
- M0 0
- M1 0
- M2 31
- M3 10
- M4 1
- M5 0
- M6 0
- M7 0
- M8+ 0
By depth
- 0–10 km 4
- 10–20 km 13
- 20–40 km 22
- 40–70 km 1
- 70–150 km 1
- 150+ km 1
Largest previous earthquakes within 100 km
Largest earthquakes in the platform catalogue and entries from historical catalogues (with citation).
- M3,9 107 km SSE of Adak, Alaska 17.10.2026 · 80 km
- M3,8 80 km ESE of Adak, Alaska 23.10.2026 · 75 km
- M3,6 67 km SE of Adak, Alaska 03.11.2026 · 52 km
- M3,4 54 km S of Adak, Alaska 20.10.2026 · 24 km
- M3,3 68 km SE of Adak, Alaska 28.10.2026 · 49 km
- M3,3 63 km SW of Adak, Alaska 19.10.2026 · 41 km
- M3,2 88 km SSE of Adak, Alaska 27.10.2026 · 61 km
- M3,2 63 km SW of Adak, Alaska 20.10.2026 · 41 km
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
ANDREANOF ISLANDS, ALEUTIAN IS.
|
4.2 ml | 70.2 km | 19:22:21.461 | Δt 0.9 sn · 1.47 km · ΔM 0 | Original record |
|
USGS Earthquake Hazards Program
Displayed
30 km S of Adak, Alaska
|
4.2 mb | 74.5 km | 19:22:20.560 | 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
-
05.11.2026 19:16:48 · USGS · update
depth: 70.2 → 74.5 latitude: 51.596 → 51.5984 longitude: -176.679 → -176.6581 time: 2026-11-04T19:22:21.461+00:00 → 2026-11-04T19:22:20.560+00:00 location: 31 km S of Adak, Alaska → 30 km S of Adak, Alaska magnitude type: ml → mb
-
05.11.2026 19:16:48 · SISTEM · recompute
depth: 70.2 → 74.5 latitude: 51.596 → 51.5984 longitude: -176.679 → -176.6581 time: 2026-11-04T19:22:21.461Z → 2026-11-04 19:22:20.560+00:00 magnitude type: ml → mb
-
05.11.2026 02:57:09 · SISTEM · recompute
source count: 1 → 2 review status: automatic → reviewed confirming sources: emsc → emsc,usgs preferred source: 3 → 4
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