Magnitude 3.1 - 67 miles NE of Chalkyitsik
September 7, 2022 20:11:10 AKDT (September 8, 2022 04:11:10 UTC)
67.4846°N 142.4455°W Depth 5.0 miles (8 km)
This event has been reviewed by a seismologist
- 73 miles (118 km) W of Old Crow
- 92 miles (149 km) SE of Arctic Village
- 99 miles (160 km) NE of Fort Yukon
- 111 miles (179 km) E of Venetie
- 123 miles (199 km) N of Circle
- 125 miles (202 km) NE of Birch Creek
- 147 miles (238 km) NE of Central
- 155 miles (251 km) NE of Beaver
- 178 miles (288 km) N of Crooked Creek
- 185 miles (299 km) S of Kaktovik
- 189 miles (306 km) SE of Pump Station #3
- 235 miles (381 km) NE of Fairbanks
- Magnitude type: Ml2
- 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.