Magnitude 4.2 - 72 miles N of Arctic Village
July 8, 2019 15:20:27 AKDT (July 8, 2019 23:20:27 UTC)
69.1057°N 144.6222°W Depth 8.4 miles (13 km)
No reports of this event being felt have been received at this time.
This event has been reviewed by a seismologist
- 74 miles (119 km) S of Kaktovik
- 99 miles (160 km) E of Pump Station #2
- 106 miles (171 km) E of Pump Station #3
- 118 miles (191 km) SE of Deadhorse
- 119 miles (192 km) SE of Prudhoe Bay
- 125 miles (202 km) SE of Pump Station #1
- 128 miles (207 km) NE of Pump Station #4
- 152 miles (246 km) N of Venetie
- 169 miles (274 km) NW of Old Crow
- 171 miles (277 km) N of Chalkyitsik
- 177 miles (286 km) N of Fort Yukon
- 306 miles (496 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.