Magnitude 1.2 - 32 miles SE of Pump Station #3
May 19, 2023 10:56:48 AKDT (May 19, 2023 18:56:48 UTC)
68.5325°N 147.9008°W Depth 1.3 miles (2 km)
This event has been reviewed by a seismologist
- 38 miles (61 km) E of Pump Station #4
- 66 miles (107 km) S of Pump Station #2
- 67 miles (108 km) NW of Arctic Village
- 97 miles (157 km) NE of Wiseman
- 101 miles (163 km) E of Anaktuvuk Pass
- 106 miles (171 km) NE of Coldfoot
- 112 miles (181 km) N of Venetie
- 115 miles (186 km) S of Deadhorse
- 119 miles (192 km) S of Prudhoe Bay
- 120 miles (194 km) SE of Umiat
- 121 miles (196 km) S of Pump Station #1
- 255 miles (413 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.
