Magnitude 2.1 - 52 miles E of Pump Station #3
August 13, 2019 07:10:09 AKDT (August 13, 2019 15:10:09 UTC)
68.8695°N 146.7539°W Depth 6.4 miles (10 km)
This event has been reviewed by a seismologist
- 60 miles (97 km) NW of Arctic Village
- 60 miles (97 km) SE of Pump Station #2
- 73 miles (118 km) NE of Pump Station #4
- 100 miles (162 km) SE of Deadhorse
- 103 miles (167 km) SE of Prudhoe Bay
- 106 miles (171 km) SE of Pump Station #1
- 115 miles (186 km) SW of Kaktovik
- 129 miles (209 km) N of Venetie
- 133 miles (215 km) NE of Wiseman
- 136 miles (220 km) NE of Anaktuvuk Pass
- 137 miles (222 km) E of Umiat
- 280 miles (453 km) N of Fairbanks
- Magnitude type: Ml
- 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.
