Magnitude 1.7 - 61 miles NW of Allakaket
March 6, 2023 08:39:42 AKST (March 6, 2023 17:39:42 UTC)
67.1866°N 154.2343°W Depth 3.8 miles (6 km)
This event has been reviewed by a seismologist
- 72 miles (116 km) W of Bettles
- 74 miles (119 km) E of Kobuk
- 79 miles (128 km) N of Hughes
- 81 miles (131 km) E of Shungnak
- 93 miles (150 km) SW of Anaktuvuk Pass
- 97 miles (157 km) E of Ambler
- 100 miles (162 km) W of Pump Station #5
- 108 miles (175 km) W of Coldfoot
- 111 miles (179 km) W of Wiseman
- 119 miles (192 km) NE of Huslia
- 152 miles (246 km) N of Tanana
- 245 miles (397 km) NW 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.
