Magnitude 3.6 - 37 miles S of Kaktovik
November 6, 2021 21:56:02 AKDT (November 7, 2021 05:56:02 UTC)
69.6278°N 144.1504°W Depth 14.4 miles (23 km)
This event has been reviewed by a seismologist
- 107 miles (173 km) E of Pump Station #2
- 108 miles (175 km) E of Prudhoe Bay
- 109 miles (176 km) E of Deadhorse
- 110 miles (178 km) N of Arctic Village
- 114 miles (184 km) E of Pump Station #1
- 127 miles (205 km) NE of Pump Station #3
- 153 miles (248 km) NE of Pump Station #4
- 187 miles (303 km) NW of Old Crow
- 190 miles (308 km) N of Venetie
- 194 miles (314 km) E of Umiat
- 206 miles (334 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.