Earthquake · Alaska
M6.0 earthquake near Nikolski, Alaska
A magnitude 6.0 earthquake struck 96 km SW of Nikolski, Alaska on 23 February 2026 at 05:11 UTC, at a depth of 14 km.
- Magnitude
- 6.0 mww
- When
- 23 February 2026, 05:11 UTC
- Depth
- 14 km
- Location
- 52.33° N, 169.87° W
- Strongest shaking (estimated)
- Intensity IV (light)
- Felt reports
- 10 people told USGS they felt it
- USGS PAGER alert
- Green
- Tsunami
- The USGS flagged it for possible tsunami. Check the official warning centres
- Source
- USGS event page
What it means
A magnitude 6.0 is a strong earthquake; there are about 130 a year worldwide, and they can cause damage in populated areas near the epicentre. At 14 km deep it was a shallow earthquake, which usually means stronger shaking near the epicentre.
The magnitude may be revised as more data comes in. Read Earthquake magnitude explained for what the numbers mean.
Aftershocks
10 earthquakes of magnitude 4 or more within 150 km in the 30 days after; the largest was a magnitude 5.5.
| Mag | Where | When (UTC) |
|---|---|---|
| 5.5 | 93 km SW of Nikolski, Alaska | 23 February 2026, 10:02 |
| 5.5 | 92 km S of Nikolski, Alaska | 5 March 2026, 19:25 |
| 4.4 | 84 km WSW of Nikolski, Alaska | 23 February 2026, 10:54 |
| 4.3 | 79 km SW of Nikolski, Alaska | 23 February 2026, 20:01 |
| 4.3 | 92 km SW of Nikolski, Alaska | 24 February 2026, 10:22 |
| 4.2 | 78 km SW of Nikolski, Alaska | 23 February 2026, 20:15 |
| 4.1 | 91 km SW of Nikolski, Alaska | 23 February 2026, 21:11 |
| 4.1 | 87 km SW of Nikolski, Alaska | 23 February 2026, 21:29 |
| 4.1 | 88 km SW of Nikolski, Alaska | 23 February 2026, 22:12 |
| 4.0 | 89 km SW of Nikolski, Alaska | 13 March 2026, 00:36 |
Near the coast, strong or long shaking can be followed by a tsunami: see Tsunami warning signs.
Not an official warning service. In an emergency, follow your local authorities.