Magnitude 2.7 - 70 miles S of Kaktovik
July 9, 2025 15:44:00 AKDT (July 9, 2025 23:44:00 UTC)
69.1210°N 143.8953°W Depth 5.8 miles (9 km)
This event has not been reviewed by a seismologist
- 80 miles (129 km) NE of Arctic Village
- 116 miles (188 km) E of Pump Station #2
- 124 miles (201 km) E of Pump Station #3
- 131 miles (212 km) SE of Deadhorse
- 132 miles (214 km) SE of Prudhoe Bay
- 138 miles (223 km) SE of Pump Station #1
- 145 miles (235 km) E of Pump Station #4
- 156 miles (252 km) NW of Old Crow
- 160 miles (259 km) NE of Venetie
- 171 miles (277 km) N of Chalkyitsik
- 181 miles (293 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.
