Magnitude 2.2 - 48 miles SW of Kaktovik
March 4, 2023 21:10:57 AKST (March 5, 2023 06:10:57 UTC)
69.4937°N 144.4198°W Depth 6.1 miles (9 km)
This event has been reviewed by a seismologist
- 99 miles (160 km) N of Arctic Village
- 100 miles (162 km) E of Pump Station #2
- 107 miles (173 km) SE of Deadhorse
- 107 miles (173 km) SE of Prudhoe Bay
- 113 miles (183 km) SE of Pump Station #1
- 117 miles (189 km) NE of Pump Station #3
- 143 miles (231 km) NE of Pump Station #4
- 179 miles (290 km) N of Venetie
- 184 miles (298 km) NW of Old Crow
- 187 miles (303 km) E of Umiat
- 197 miles (319 km) N of Chalkyitsik
- Magnitude type: Ml
- 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.
