⚠️ This earthquake carries a tsunami threat. Follow official guidance from your national agency.
STRONG EARTHQUAKE
163 km WSW of Nikolski, Alaska
A magnitude 6.4 earthquake struck 163 km WSW of Nikolski, Alaska on 17 Sept 2026, 14:19 UTC. The hypocentre was 114.8 km below the surface — intermediate by seismological convention. No felt reports have been received so far. The reporting agency flagged a tsunami threat for this event; follow official warnings rather than this page. The figures have been revised 3 times since the first report. 4 other earthquakes above our reporting threshold have been recorded within 250 km in the past 30 days.
- Depth
- 114.8 km
- Latitude
- 52.54°N
- Time
- 14:19 UTC
- Magnitude
- M6.4
intermediate
171.19°W longitude
17 Sept 2026
ml
EPICENTRE
MAGNITUDE 6.4
Can be destructive in populated areas up to about 160 km across.
The scale is logarithmic: this released about 130 times the energy of a magnitude 5.0, roughly the energy of 60 thousand tonnes of TNT.
114.8 KM DEEP
At this depth the energy spreads before it reaches the surface. Shaking is usually weaker than a shallow earthquake of the same size, but it can be felt across a wider area.
NEARBY IN THE PAST 30 DAYS
4 earthquakes above our reporting threshold within 250 km of this one, the largest a magnitude 6.5.
OTHER RECENT EARTHQUAKES
17 Sept 2026, 14:46 UTC · 20 km deep
17 Sept 2026, 14:34 UTC · 20 km deep
17 Sept 2026, 14:19 UTC · 83 km deep
17 Sept 2026, 14:19 UTC · 111.7 km deep