Magnitude 3.7 - 64 miles SW of Kaktovik
October 9, 2024 11:07:45 AKDT (October 9, 2024 19:07:45 UTC)
69.2987°N 144.7901°W Depth 5.0 miles (8 km)
This event has been reviewed by a seismologist
- 83 miles (134 km) N of Arctic Village
- 92 miles (149 km) E of Pump Station #2
- 105 miles (170 km) E of Pump Station #3
- 106 miles (171 km) SE of Deadhorse
- 107 miles (173 km) SE of Prudhoe Bay
- 113 miles (183 km) SE of Pump Station #1
- 129 miles (209 km) NE of Pump Station #4
- 164 miles (265 km) N of Venetie
- 179 miles (290 km) E of Umiat
- 181 miles (293 km) NW of Old Crow
- 185 miles (299 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.
