Magnitude 1.3 - 44 miles E of Pump Station #3
September 10, 2019 13:57:27 AKDT (September 10, 2019 21:57:27 UTC)
68.6576°N 147.1516°W Depth 9.5 miles (15 km)
This event has been reviewed by a seismologist
- 55 miles (89 km) NW of Arctic Village
- 58 miles (94 km) E of Pump Station #4
- 65 miles (105 km) SE of Pump Station #2
- 110 miles (178 km) S of Deadhorse
- 114 miles (184 km) S of Prudhoe Bay
- 115 miles (186 km) NE of Wiseman
- 116 miles (188 km) S of Pump Station #1
- 116 miles (188 km) N of Venetie
- 122 miles (197 km) E of Anaktuvuk Pass
- 125 miles (202 km) NE of Coldfoot
- 133 miles (215 km) SW of Kaktovik
- 264 miles (428 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.