76 km W of Adak, Alaska
28 October 2026, 07:51:27 (+03) 2026-10-28 04:51:27 UTC
- Magnitude
- 3.0 ml
- Depth
- 11.4 km
- Coordinates
- 51.8520, -177.7430
- Data consistency
- 90/100
Regional activity (100 km)
- Last 24 hours
- 0
- Last 7 days
- 6
- Last 30 days
- 31
Approximate energy released
≈ 0.5 t TNT
2.00e+9 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
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
36 earthquakes
By magnitude
- M0 0
- M1 0
- M2 24
- M3 8
- M4 4
- M5 0
- M6 0
- M7 0
- M8+ 0
By depth
- 0–10 km 5
- 10–20 km 14
- 20–40 km 13
- 40–70 km 1
- 70–150 km 2
- 150+ km 1
Largest previous earthquakes within 100 km
Largest earthquakes in the platform catalogue and entries from historical catalogues (with citation).
- M4,6 153 km WNW of Adak, Alaska 25.10.2026 · 82 km
- M3,5 126 km WSW of Adak, Alaska 25.09.2026 · 67 km
- M3,4 54 km S of Adak, Alaska 20.10.2026 · 91 km
- M3,3 63 km SW of Adak, Alaska 19.10.2026 · 64 km
- M3,2 63 km SW of Adak, Alaska 20.10.2026 · 62 km
- M3,1 123 km WSW of Adak, Alaska 09.10.2026 · 68 km
- M3,0 127 km WSW of Adak, Alaska 19.10.2026 · 69 km
- M3,0 63 km S of Adak, Alaska 16.10.2026 · 92 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.
|
2.8 ml | 5.6 km | 04:51:27.240 | Δt 0.11 sn · 2.74 km · ΔM -0.2 | Original record |
|
USGS Earthquake Hazards Program
Displayed
76 km W of Adak, Alaska
|
3.0 ml | 11.4 km | 04:51:27.354 | 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
-
03.11.2026 02:08:06 · USGS · update
depth: 5.57 → 11.4 latitude: 51.87617 → 51.852 longitude: -177.73567 → -177.743 magnitude: 2.8 → 3 time: 2026-10-28T04:51:27.240+00:00 → 2026-10-28T04:51:27.354+00:00 location: 75 km W of Adak, Alaska → 76 km W of Adak, Alaska
-
03.11.2026 02:08:06 · SISTEM · recompute
depth: 5.57 → 11.4 latitude: 51.87617 → 51.852 longitude: -177.73567 → -177.743 magnitude: 2.8 → 3 time: 2026-10-28T04:51:27.240Z → 2026-10-28 04:51:27.354+00:00
-
29.10.2026 23:45:45 · SISTEM · recompute
depth: 5.6 → 5.57 latitude: 51.8762 → 51.87617 longitude: -177.7357 → -177.73567 source count: 1 → 2 review status: automatic → reviewed confirming sources: emsc → emsc,usgs preferred source: 3 → 4
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