Magnitude 1.8 - 28 miles S of Kaktovik
May 23, 2025 21:33:52 AKDT (May 24, 2025 05:33:52 UTC)
69.7219°N 143.4127°W Depth 8.1 miles (13 km)
This event has not been reviewed by a seismologist
- 122 miles (197 km) NE of Arctic Village
- 122 miles (197 km) E of Prudhoe Bay
- 123 miles (199 km) E of Deadhorse
- 125 miles (202 km) E of Pump Station #2
- 128 miles (207 km) E of Pump Station #1
- 146 miles (236 km) NE of Pump Station #3
- 172 miles (278 km) NE of Pump Station #4
- 182 miles (295 km) NW of Old Crow
- 202 miles (327 km) N of Venetie
- 212 miles (343 km) N of Chalkyitsik
- 212 miles (343 km) E of Umiat
- 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.
