Magnitude 1.1 - 21 miles N of Arctic Village
September 9, 2019 21:22:17 AKDT (September 10, 2019 05:22:17 UTC)
68.4144°N 145.2844°W Depth 7.3 miles (11 km)
This event has been reviewed by a seismologist
- 94 miles (152 km) E of Pump Station #3
- 102 miles (165 km) N of Venetie
- 104 miles (168 km) E of Pump Station #4
- 109 miles (176 km) SE of Pump Station #2
- 125 miles (202 km) S of Kaktovik
- 128 miles (207 km) N of Fort Yukon
- 129 miles (209 km) N of Chalkyitsik
- 143 miles (231 km) NE of Wiseman
- 145 miles (235 km) SE of Deadhorse
- 147 miles (238 km) SE of Prudhoe Bay
- 150 miles (243 km) N of Birch Creek
- 256 miles (415 km) N 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.