Magnitude 1.3 - 44 miles SW of Kaktovik
June 18, 2019 14:12:46 AKDT (June 18, 2019 22:12:46 UTC)
69.5527°N 144.4218°W Depth 5.9 miles (9 km)
This event has been reviewed by a seismologist
- 100 miles (162 km) E of Pump Station #2
- 103 miles (167 km) N of Arctic Village
- 105 miles (170 km) SE of Deadhorse
- 105 miles (170 km) SE of Prudhoe Bay
- 111 miles (179 km) SE of Pump Station #1
- 119 miles (192 km) NE of Pump Station #3
- 145 miles (235 km) NE of Pump Station #4
- 183 miles (296 km) N of Venetie
- 187 miles (303 km) NW of Old Crow
- 187 miles (303 km) E of Umiat
- 201 miles (325 km) N of Chalkyitsik
- 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.