Magnitude 1.1 - 26 miles SW of Allakaket
June 9, 2021 01:44:02 AKDT (June 9, 2021 09:44:02 UTC)
66.3780°N 153.4822°W Depth 1.8 miles (2 km)
This event has been reviewed by a seismologist
- 32 miles (51 km) NE of Hughes
- 61 miles (98 km) SW of Bettles
- 83 miles (134 km) W of Pump Station #5
- 93 miles (150 km) NW of Tanana
- 94 miles (152 km) NE of Huslia
- 100 miles (162 km) E of Kobuk
- 106 miles (171 km) E of Shungnak
- 108 miles (175 km) SW of Coldfoot
- 111 miles (179 km) W of Pump Station #6
- 111 miles (179 km) NW of Rampart
- 116 miles (188 km) SW of Wiseman
- 196 miles (317 km) NW 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.