Magnitude 2.6 - 54 miles S of Kaktovik
June 28, 2020 20:08:14 AKDT (June 29, 2020 04:08:14 UTC)
69.3521°N 143.8686°W Depth 1.5 miles (2 km)
This event has been reviewed by a seismologist
- 95 miles (154 km) NE of Arctic Village
- 114 miles (184 km) E of Pump Station #2
- 123 miles (199 km) SE of Deadhorse
- 123 miles (199 km) SE of Prudhoe Bay
- 127 miles (205 km) E of Pump Station #3
- 129 miles (209 km) SE of Pump Station #1
- 151 miles (244 km) NE of Pump Station #4
- 168 miles (272 km) NW of Old Crow
- 175 miles (283 km) N of Venetie
- 187 miles (303 km) N of Chalkyitsik
- 196 miles (317 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.