Magnitude 1.7 - 30 miles SE of Pump Station #4
March 1, 2025 14:23:26 AKST (March 1, 2025 23:23:26 UTC)
68.1420°N 148.4637°W Depth 6.8 miles (11 km)
This event has been reviewed by a seismologist
- 49 miles (79 km) S of Pump Station #3
- 67 miles (108 km) NE of Wiseman
- 75 miles (121 km) W of Arctic Village
- 76 miles (123 km) NE of Coldfoot
- 84 miles (136 km) E of Anaktuvuk Pass
- 91 miles (147 km) S of Pump Station #2
- 95 miles (154 km) NW of Venetie
- 109 miles (176 km) NE of Pump Station #5
- 120 miles (194 km) NE of Bettles
- 125 miles (202 km) SE of Umiat
- 127 miles (205 km) N of Beaver
- 229 miles (371 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.
