Magnitude 2.5 - 73 miles N of Arctic Village
August 13, 2019 02:43:03 AKDT (August 13, 2019 10:43:03 UTC)
69.1290°N 144.7181°W Depth 6.7 miles (10 km)
This event has been reviewed by a seismologist
- 74 miles (119 km) S of Kaktovik
- 97 miles (157 km) E of Pump Station #2
- 104 miles (168 km) E of Pump Station #3
- 115 miles (186 km) SE of Deadhorse
- 116 miles (188 km) SE of Prudhoe Bay
- 122 miles (197 km) SE of Pump Station #1
- 126 miles (204 km) NE of Pump Station #4
- 153 miles (248 km) N of Venetie
- 172 miles (278 km) NW of Old Crow
- 173 miles (280 km) N of Chalkyitsik
- 178 miles (288 km) N of Fort Yukon
- 307 miles (497 km) N of Fairbanks
- Magnitude type: Ml2
- 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.