This page summarizes earthquakes in Unorganized Borough (United States). The most recently recorded event was a magnitude M1.4 earthquake near Unorganized Borough on 2026-07-31 07:03:00 UTC. All event lists and map markers are limited to the last 30 days.
The Unorganized Borough is composed of the portions of the U.S. state of Alaska which are not contained in any of its 19 organized boroughs. While referred to as the "Unorganized Borough", it is not a borough itself, as it forgoes that level of government structure.
In 2026, Unorganized Borough recorded 1179 earthquakes within United States. The average magnitude was M1.78. The strongest event reached M5.8.
By event count in 2026, this region ranks #6 within United States.
Considering the strongest recorded event in 2026, Unorganized Borough is among the Top 5 strongest regions in United States (rank #2 by max magnitude).
Located on the North America Plate.
