M2.5 earthquake — 139 km S of Unalaska, Alaska
An magnitude 2.5 earthquake occurred 139 km S of Unalaska, Alaska on Oct 21, 2026 at 13:38 UTC. The epicenter was at a depth of 3 km — a shallow earthquake. Shallow quakes concentrate their energy near the surface, so they tend to produce stronger shaking close to the epicenter.
Event data
| Magnitude | M2.5 |
|---|---|
| Depth | 2.6 km |
| Coordinates | 52.620, -166.530 |
| Time | Oct 21, 13:38 UTC |
| Location | 139 km S of Unalaska, Alaska |
| USGS event ID | aka2026uwfrty |
What this magnitude typically means
Very small earthquakes are usually only detected by instruments and are rarely felt. They are a normal part of background seismic activity. Tremor does not compute a single local shaking figure here, because how strong a quake feels at any address depends on distance, depth and local geology — open the interactive globe to explore the ShakeMap and estimated intensity.
Nearby recent earthquakes
| Magnitude | Distance | Time (UTC) | Location |
|---|---|---|---|
| M3.8 | 67 km | Oct 18, 08:02 UTC | 86 km SSW of Unalaska, Alaska |
| M2.5 | 89 km | Oct 19, 17:30 UTC | 77 km SE of Unalaska, Alaska |
| M2.5 | 91 km | Oct 18, 12:18 UTC | 124 km SE of Unalaska, Alaska |
| M2.5 | 96 km | Oct 21, 11:33 UTC | 94 km SE of Unalaska, Alaska |
| M3.6 | 101 km | Oct 19, 19:54 UTC | 81 km SE of Unalaska, Alaska |
| M4.5 | 138 km | Oct 24, 08:33 UTC | 81 km SSE of Akutan, Alaska |
Earthquake activity in this area
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Source: USGS earthquake catalog. Automated readings may be revised. Not for emergency use.