Magnitude 1.8 - 13 miles NE of Hughes
September 18, 2023 00:06:53 AKDT (September 18, 2023 08:06:53 UTC)
66.2033°N 154.0172°W Depth 0.0 miles (0 km)
This event has not been reviewed by a seismologist
- 45 miles (72 km) SW of Allakaket
- 76 miles (123 km) NE of Huslia
- 81 miles (131 km) SW of Bettles
- 90 miles (145 km) NW of Tanana
- 92 miles (149 km) SE of Kobuk
- 98 miles (158 km) SE of Shungnak
- 102 miles (165 km) SW of Pump Station #5
- 110 miles (178 km) N of Ruby
- 119 miles (192 km) NW of Rampart
- 121 miles (196 km) SE of Ambler
- 123 miles (199 km) W of Pump Station #6
- 204 miles (330 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.
