Magnitude 2.9 - 57 miles NE of Chalkyitsik
March 21, 2025 05:56:03 AKDT (March 21, 2025 13:56:03 UTC)
67.0818°N 141.9215°W Depth 10.8 miles (17 km)
This event has been reviewed by a seismologist
- 65 miles (105 km) SW of Old Crow
- 98 miles (158 km) NE of Fort Yukon
- 105 miles (170 km) NE of Circle
- 119 miles (192 km) SE of Arctic Village
- 121 miles (196 km) NE of Birch Creek
- 121 miles (196 km) E of Venetie
- 131 miles (212 km) NE of Central
- 149 miles (241 km) N of Crooked Creek
- 158 miles (256 km) E of Beaver
- 160 miles (259 km) N of Eagle
- 207 miles (335 km) NE of Chatanika
- 225 miles (364 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.
