Magnitude 3.9 - 63 miles SW of Kaktovik
October 12, 2024 14:23:40 AKDT (October 12, 2024 22:23:40 UTC)
69.3207°N 144.8804°W Depth 11.3 miles (18 km)
This event has been reviewed by a seismologist
- 84 miles (136 km) N of Arctic Village
- 90 miles (145 km) E of Pump Station #2
- 103 miles (167 km) E of Pump Station #3
- 104 miles (168 km) SE of Deadhorse
- 105 miles (170 km) SE of Prudhoe Bay
- 110 miles (178 km) SE of Pump Station #1
- 128 miles (207 km) NE of Pump Station #4
- 165 miles (267 km) N of Venetie
- 177 miles (286 km) E of Umiat
- 184 miles (298 km) NW of Old Crow
- 187 miles (303 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.
