M5.2 earthquake · Fox Islands, Aleutians (Alaska)
The Fox Islands region (eastern Aleutians, Alaska) has been seismically active since 1 September 2026. Strongest event: M5.2 at about 29 km depth. The Aleutians lie on one of Earth's most active subduction zones; the area is sparsely populated.
Map of the series
Distribution by magnitude
Timeline
Magnitude over time
Impact
We have no confirmed reports of casualties or damage for this event. Any information on consequences is added solely from named official sources.
The strongest earthquakes of the series
| Time | Mag. | Depth | Location |
|---|---|---|---|
| 9. Sep, 02:23 | M3.6 | 19 km | FOX ISLANDS, ALEUTIAN ISLANDS |
| 9. Sep, 01:02 | M4.2 | 10 km | FOX ISLANDS, ALEUTIAN ISLANDS |
| 8. Sep, 20:00 | M3.6 | 12 km | 92 km SSW of Nikolski, Alaska |
| 7. Sep, 04:28 | M3.3 | 14 km | 85 km SSW of Nikolski, Alaska |
| 6. Sep, 17:28 | M3.6 | 10 km | 95 km SSW of Nikolski, Alaska |
| 6. Sep, 16:58 | M3.1 | 10 km | 109 km SSW of Nikolski, Alaska |
| 6. Sep, 06:22 | M3.7 | 10 km | 106 km SSW of Nikolski, Alaska |
| 5. Sep, 20:00 | M4.9 | 35 km | FOX ISLANDS, ALEUTIAN ISLANDS |
| 5. Sep, 04:57 | M3.5 | 12 km | 102 km SSW of Nikolski, Alaska |
| 4. Sep, 17:33 | M3.1 | 20 km | 107 km SSW of Nikolski, Alaska |
| 4. Sep, 16:52 | M3.4 | 17 km | FOX ISLANDS, ALEUTIAN ISLANDS |
| 4. Sep, 16:39 | M4.0 | 21 km | FOX ISLANDS, ALEUTIAN ISLANDS |
| 4. Sep, 16:08 | M3.1 | 10 km | 98 km SSW of Nikolski, Alaska |
| 4. Sep, 14:02 | M3.1 | 15 km | 89 km SSW of Nikolski, Alaska |
| 4. Sep, 12:23 | M3.2 | 15 km | 84 km SSW of Nikolski, Alaska |
| 4. Sep, 11:25 | M3.5 | 12 km | 87 km SSW of Nikolski, Alaska |
| 4. Sep, 09:25 | M3.0 | 6 km | 89 km SSW of Nikolski, Alaska |
| 4. Sep, 06:38 | M3.5 | 4 km | 108 km S of Nikolski, Alaska |
| 4. Sep, 05:34 | M3.7 | 9 km | 113 km S of Nikolski, Alaska |
| 4. Sep, 04:50 | M3.0 | 19 km | 115 km SSW of Nikolski, Alaska |
| 4. Sep, 04:39 | M3.0 | 10 km | 88 km SSW of Nikolski, Alaska |
| 4. Sep, 04:06 | M4.1 | 21 km | FOX ISLANDS, ALEUTIAN ISLANDS |
| 4. Sep, 04:05 | M3.1 | 28 km | 108 km SSW of Nikolski, Alaska |
| 4. Sep, 03:47 | M3.5 | 18 km | 107 km SSW of Nikolski, Alaska |
| 4. Sep, 03:38 | M3.2 | 20 km | 113 km SSW of Nikolski, Alaska |
Background
What is an earthquake series?
An earthquake series – also called a swarm – is a cluster of many quakes in one region over hours to weeks. After a strong quake, numerous aftershocks typically follow, decreasing in number and strength over time.
How should the magnitude be read?
The magnitude scale is logarithmic: a magnitude 6 quake releases around 32 times the energy of a magnitude 5. Whether a quake is felt depends not only on its strength but strongly on focal depth and distance to populated areas.
Where does the data come from?
All figures, the timeline and the map are merged continuously from ten seismological services (including USGS, EMSC, GEOFON, GEONET and Spain’s IGN). Information on human consequences is in no earthquake database – we add it solely from named official sources.
Frequently asked questions
How many quakes does this series include?
So far 170 quakes have been counted in this series (all magnitudes in the area).
How strong was the biggest quake?
The strongest quake reached M6.3 on 3. Sep (Fox Islands, Aleutian Islands (Alaska, USA)).
Is the series still active?
No, this event is considered concluded.
Are casualties or damage known?
We have no confirmed reports of casualties or damage for this event. Any information on consequences is added solely from named official sources.
All figures and the map are computed live from ten seismological data sources on every visit — nothing is hard-coded. Individual earthquakes are on the map and in the full list.