Magnitude 3.8 - 51 miles NE of Chalkyitsik
March 30, 2025 18:55:38 AKDT (March 31, 2025 02:55:38 UTC)
67.2100°N 142.5005°W Depth 8.8 miles (14 km)
This event has been reviewed by a seismologist
- 77 miles (124 km) W of Old Crow
- 88 miles (142 km) NE of Fort Yukon
- 102 miles (165 km) SE of Arctic Village
- 105 miles (170 km) NE of Circle
- 106 miles (171 km) E of Venetie
- 112 miles (181 km) NE of Birch Creek
- 130 miles (210 km) NE of Central
- 146 miles (236 km) NE of Beaver
- 160 miles (259 km) N of Crooked Creek
- 171 miles (277 km) N of Eagle
- 197 miles (319 km) E of Pump Station #4
- 220 miles (356 km) NE of Fairbanks
- Magnitude type: Ml
- Event type: earthquake
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.
