Magnitude 3.5 - 43 miles S of Kaktovik
March 1, 2026 09:23:06 AKST (March 1, 2026 18:23:06 UTC)
69.5209°N 143.9703°W Depth 2.5 miles (4 km)
This event has been reviewed by a seismologist
- 104 miles (168 km) N of Arctic Village
- 111 miles (179 km) E of Pump Station #2
- 115 miles (186 km) SE of Prudhoe Bay
- 116 miles (188 km) E of Deadhorse
- 121 miles (196 km) SE of Pump Station #1
- 128 miles (207 km) NE of Pump Station #3
- 154 miles (249 km) NE of Pump Station #4
- 178 miles (288 km) NW of Old Crow
- 185 miles (299 km) N of Venetie
- 198 miles (321 km) N of Chalkyitsik
- 198 miles (321 km) E of Umiat
- Magnitude type: ML
- Event type: N/A
Tectonic Setting of the Brooks Range
Seismicity in the Brooks Range is characterized by intraplate earthquakes associated with mountain building and crustal reorganization. A broad earthquake band extends from northeast of the Brooks Range toward the Beaufort Sea. Earthquake source mechanisms comprise a mixture of strike-slip and normal faulting events, indicative of north-northwest compression and northeast extension. A magnitude 6.4 earthquake on August 12, 2018 located 43 miles (69 km) south of Kaktovik was the largest earthquake ever recorded north of the Brooks Range. It produced an energetic aftershock sequence that continues to this day. In 2019, a vigorous swarm sequence began in the Purcell Mountains. More than 9,000 earthquakes have been recorded as part of this swarm through the end of 2021, including five earthquakes with magnitudes larger than 5. At present, this swarm continues, though at a decreased activity level.
