Magnitude 3.7 - 45 miles S of Kaktovik
March 18, 2026 17:53:22 AKDT (March 19, 2026 01:53:22 UTC)
69.4721°N 143.6768°W Depth 3.1 miles (5 km)
This event has been reviewed by a seismologist
- 104 miles (168 km) NE of Arctic Village
- 118 miles (191 km) E of Pump Station #2
- 123 miles (199 km) E of Deadhorse
- 123 miles (199 km) SE of Prudhoe Bay
- 129 miles (209 km) SE of Pump Station #1
- 134 miles (217 km) E of Pump Station #3
- 159 miles (257 km) NE of Pump Station #4
- 171 miles (277 km) NW of Old Crow
- 184 miles (298 km) N of Venetie
- 195 miles (316 km) N of Chalkyitsik
- 205 miles (332 km) N of Fort Yukon
- 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.
