M4.0 earthquake near Nikolski, Alaska

161 km S of Nikolski, Alaska · Oct 19, 2026, 05:08 UTC

4.0 Magnitude 4.0 (mb)

Reviewed by a seismologist · source: U.S. Geological Survey

Time	Oct 19, 2026, 05:08:40 UTC
Location	161 km S of Nikolski, Alaska 51.515° N, 168.422° W
Depth	10 km (6 mi)
Last updated by USGS	Oct 19, 2026, 16:31 UTC

Tsunami

Official tsunami messages for the US are published by the US Tsunami Warning Centers. Outside the US, follow your national warning agency. Latest tsunami messages.

Other earthquakes nearby

USGS-recorded earthquakes within 200 km (124 mi) in the week before and after this one.

2.7 94 km SSW of Unalaska, Alaska Oct 23, 18:33 UTC
2.8 77 km E of Nikolski, Alaska Oct 23, 10:27 UTC
3.7 40 km SSE of Nikolski, Alaska Oct 23, 09:18 UTC
2.8 89 km SW of Nikolski, Alaska Oct 22, 15:13 UTC
3.1 163 km SW of Nikolski, Alaska Oct 22, 02:57 UTC
2.9 121 km SSW of Nikolski, Alaska Oct 21, 19:20 UTC
2.5 139 km S of Unalaska, Alaska Oct 21, 13:38 UTC
2.5 85 km SSW of Nikolski, Alaska Oct 19, 22:59 UTC
2.8 114 km SSW of Nikolski, Alaska Oct 19, 12:34 UTC
3.7 123 km SSW of Nikolski, Alaska Oct 19, 11:44 UTC
2.6 102 km S of Nikolski, Alaska Oct 19, 00:22 UTC
2.8 103 km SSW of Nikolski, Alaska Oct 18, 19:51 UTC
2.6 81 km SE of Nikolski, Alaska Oct 16, 21:17 UTC
2.8 154 km ESE of Nikolski, Alaska Oct 16, 20:45 UTC
2.9 171 km SE of Nikolski, Alaska Oct 16, 14:59 UTC

Official sources

USGS event page (ShakeMap, technical details, updates)
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About this data

Earthquake data comes from the USGS real-time feeds and is checked every 5 minutes. Early magnitudes, locations and depths are automatic and can change when seismologists review the event. Nearest towns are calculated from GeoNames places with 15,000 or more people; an earthquake is listed under a country or state when the nearest such town within 300 km (186 mi) is there, or when USGS names that place.

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