Magnitude 3.7 - 52 miles S of Kaktovik
June 19, 2020 08:58:58 AKDT (June 19, 2020 16:58:58 UTC)
69.3760°N 143.9077°W Depth 6.9 miles (11 km)
This event has been reviewed by a seismologist
- 96 miles (155 km) NE of Arctic Village
- 113 miles (183 km) E of Pump Station #2
- 122 miles (197 km) SE of Deadhorse
- 122 miles (197 km) SE of Prudhoe Bay
- 127 miles (205 km) E of Pump Station #3
- 128 miles (207 km) SE of Pump Station #1
- 151 miles (244 km) NE of Pump Station #4
- 170 miles (275 km) NW of Old Crow
- 176 miles (285 km) N of Venetie
- 188 miles (304 km) N of Chalkyitsik
- 198 miles (321 km) N of Fort Yukon
- 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.