Magnitude 2.2 - 26 miles NW of Beaver
September 17, 2023 19:08:57 AKDT (September 18, 2023 03:08:57 UTC)
66.5377°N 148.2272°W Depth 5.9 miles (9 km)
This event has not been reviewed by a seismologist
- 44 miles (71 km) NE of Stevens Village
- 59 miles (95 km) SW of Venetie
- 64 miles (103 km) NE of Pump Station #6
- 69 miles (111 km) E of Pump Station #5
- 70 miles (113 km) W of Birch Creek
- 71 miles (115 km) N of Livengood
- 73 miles (118 km) SE of Coldfoot
- 79 miles (128 km) SE of Wiseman
- 81 miles (131 km) W of Fort Yukon
- 85 miles (137 km) N of Pump Station #7
- 90 miles (145 km) NE of Rampart
- 118 miles (191 km) N 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.
