Magnitude 2.2 - 51 miles N of Arctic Village
September 11, 2023 16:32:52 AKDT (September 12, 2023 00:32:52 UTC)
68.8504°N 145.0958°W Depth 6.2 miles (10 km)
This event has been reviewed by a seismologist
- 93 miles (150 km) E of Pump Station #3
- 95 miles (154 km) SW of Kaktovik
- 95 miles (154 km) SE of Pump Station #2
- 111 miles (179 km) E of Pump Station #4
- 123 miles (199 km) SE of Deadhorse
- 125 miles (202 km) SE of Prudhoe Bay
- 129 miles (209 km) SE of Pump Station #1
- 132 miles (214 km) N of Venetie
- 156 miles (252 km) N of Chalkyitsik
- 158 miles (256 km) N of Fort Yukon
- 163 miles (264 km) NE of Wiseman
- 286 miles (463 km) N of Fairbanks
- 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.
