M3.9 earthquake — 150 km WSW of Adak, Alaska
An magnitude 3.9 earthquake occurred 150 km WSW of Adak, Alaska on Sep 13, 2026 at 02:08 UTC. The epicenter was at a depth of 39 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 | M3.9 |
|---|---|
| Depth | 38.7 km |
| Coordinates | 51.216, -178.530 |
| Time | Sep 13, 02:08 UTC |
| Location | 150 km WSW of Adak, Alaska |
| USGS event ID | us7000th2x |
What this magnitude typically means
Minor earthquakes are often felt close to the epicenter but almost never cause damage. Whether you feel one at all depends on how near and how shallow it is. 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 |
|---|---|---|---|
| M5.3 | 1 km | Sep 11, 10:47 UTC | 151 km WSW of Adak, Alaska |
| M3.5 | 11 km | Sep 12, 03:43 UTC | 151 km SW of Adak, Alaska |
| M4.3 | 14 km | Sep 11, 10:52 UTC | 151 km SW of Adak, Alaska |
| M3.1 | 16 km | Sep 11, 10:51 UTC | 152 km SW of Adak, Alaska |
| M3.2 | 17 km | Sep 9, 18:48 UTC | 155 km SW of Adak, Alaska |
| M2.5 | 19 km | Sep 11, 11:11 UTC | 135 km SW of Adak, Alaska |
Earthquake activity in this area
Source: USGS earthquake catalog. Automated readings may be revised. Not for emergency use.