Magnitude 1.9 - 63 miles N of Arctic Village
June 30, 2020 07:42:47 AKDT (June 30, 2020 15:42:47 UTC)
68.9935°N 144.8553°W Depth 7.8 miles (12 km)
This event has been reviewed by a seismologist
- 84 miles (136 km) S of Kaktovik
- 96 miles (155 km) E of Pump Station #2
- 99 miles (160 km) E of Pump Station #3
- 119 miles (192 km) SE of Deadhorse
- 120 miles (194 km) E of Pump Station #4
- 121 miles (196 km) SE of Prudhoe Bay
- 126 miles (204 km) SE of Pump Station #1
- 143 miles (231 km) N of Venetie
- 164 miles (265 km) N of Chalkyitsik
- 169 miles (274 km) N of Fort Yukon
- 169 miles (274 km) NW of Old Crow
- 297 miles (481 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.