Magnitude 3.8 - 53 miles NE of Chalkyitsik
March 30, 2025 18:55:38 AKDT (March 31, 2025 02:55:38 UTC)
67.2490°N 142.4896°W Depth 8.5 miles (13 km)
This event has been reviewed by a seismologist
- 76 miles (123 km) W of Old Crow
- 89 miles (144 km) NE of Fort Yukon
- 100 miles (162 km) SE of Arctic Village
- 107 miles (173 km) E of Venetie
- 108 miles (175 km) NE of Circle
- 114 miles (184 km) NE of Birch Creek
- 132 miles (214 km) NE of Central
- 147 miles (238 km) NE of Beaver
- 162 miles (262 km) N of Crooked Creek
- 174 miles (282 km) N of Eagle
- 196 miles (317 km) E of Pump Station #4
- 222 miles (359 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.
