Magnitude 1.3 - 60 miles NE of Kobuk
September 10, 2019 15:04:17 AKDT (September 10, 2019 23:04:17 UTC)
67.5901°N 155.4939°W Depth 4.1 miles (6 km)
This event has been reviewed by a seismologist
- 65 miles (105 km) NE of Shungnak
- 72 miles (116 km) NE of Ambler
- 105 miles (170 km) NW of Allakaket
- 105 miles (170 km) W of Anaktuvuk Pass
- 112 miles (181 km) NW of Bettles
- 112 miles (181 km) N of Hughes
- 133 miles (215 km) N of Huslia
- 138 miles (223 km) E of Kiana
- 139 miles (225 km) NE of Selawik
- 140 miles (226 km) NW of Pump Station #5
- 143 miles (231 km) W of Coldfoot
- 288 miles (466 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.