Magnitude 0.9 - 43 miles S of Shungnak
June 19, 2019 16:33:17 AKDT (June 20, 2019 00:33:17 UTC)
66.2942°N 157.5742°W Depth 2.2 miles (3 km)
This event has been reviewed by a seismologist
- 46 miles (74 km) SW of Kobuk
- 53 miles (85 km) NW of Huslia
- 55 miles (89 km) S of Ambler
- 70 miles (113 km) E of Selawik
- 78 miles (126 km) NE of Buckland
- 92 miles (149 km) SE of Kiana
- 94 miles (152 km) W of Hughes
- 98 miles (158 km) N of Koyukuk
- 102 miles (165 km) E of Noorvik
- 109 miles (176 km) N of Galena
- 110 miles (178 km) N of Nulato
- 257 miles (416 km) NE of Nome
- 299 miles (484 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.