Magnitude 1.9 - 48 miles SE of Pump Station #3
September 25, 2023 21:29:53 AKDT (September 26, 2023 05:29:53 UTC)
68.5461°N 147.1121°W Depth 3.8 miles (6 km)
This event has been reviewed by a seismologist
- 50 miles (81 km) NW of Arctic Village
- 58 miles (94 km) E of Pump Station #4
- 73 miles (118 km) SE of Pump Station #2
- 108 miles (175 km) N of Venetie
- 110 miles (178 km) NE of Wiseman
- 118 miles (191 km) S of Deadhorse
- 120 miles (194 km) NE of Coldfoot
- 121 miles (196 km) E of Anaktuvuk Pass
- 122 miles (197 km) S of Prudhoe Bay
- 124 miles (201 km) S of Pump Station #1
- 137 miles (222 km) E of Umiat
- 257 miles (416 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.
