Magnitude 1.7 - 45 miles SE of Pump Station #3
September 10, 2019 13:43:24 AKDT (September 10, 2019 21:43:24 UTC)
68.5157°N 147.264°W Depth 8.9 miles (14 km)
This event has been reviewed by a seismologist
- 52 miles (84 km) NW of Arctic Village
- 54 miles (87 km) E of Pump Station #4
- 73 miles (118 km) SE of Pump Station #2
- 106 miles (171 km) N of Venetie
- 106 miles (171 km) NE of Wiseman
- 116 miles (188 km) NE of Coldfoot
- 117 miles (189 km) E of Anaktuvuk Pass
- 119 miles (192 km) S of Deadhorse
- 123 miles (199 km) S of Prudhoe Bay
- 125 miles (202 km) S of Pump Station #1
- 135 miles (218 km) SE of Umiat
- 255 miles (413 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.