Magnitude 2.0 - 45 miles E of Pump Station #3
August 13, 2019 14:34:25 AKDT (August 13, 2019 22:34:25 UTC)
68.9945°N 147.0659°W Depth 4.2 miles (6 km)
This event has been reviewed by a seismologist
- 49 miles (79 km) SE of Pump Station #2
- 70 miles (113 km) NE of Pump Station #4
- 72 miles (116 km) NW of Arctic Village
- 89 miles (144 km) S of Deadhorse
- 92 miles (149 km) S of Prudhoe Bay
- 95 miles (154 km) SE of Pump Station #1
- 114 miles (184 km) SW of Kaktovik
- 127 miles (205 km) E of Umiat
- 132 miles (214 km) NE of Anaktuvuk Pass
- 135 miles (218 km) NE of Wiseman
- 138 miles (223 km) N of Venetie
- 288 miles (466 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.