Magnitude 2.7 - 70 miles S of Kaktovik
August 24, 2025 22:36:56 AKDT (August 25, 2025 06:36:56 UTC)
69.1200°N 144.1105°W Depth 0.8 miles (1 km)
This event has not been reviewed by a seismologist
- 78 miles (126 km) NE of Arctic Village
- 111 miles (179 km) E of Pump Station #2
- 119 miles (192 km) E of Pump Station #3
- 127 miles (205 km) SE of Deadhorse
- 128 miles (207 km) SE of Prudhoe Bay
- 134 miles (217 km) SE of Pump Station #1
- 140 miles (226 km) NE of Pump Station #4
- 158 miles (256 km) N of Venetie
- 160 miles (259 km) NW of Old Crow
- 171 miles (277 km) N of Chalkyitsik
- 180 miles (291 km) N of Fort Yukon
- 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.
