Magnitude 3.7 - 23 miles NW of Hughes

February 28, 2023 21:04:02 AKST (March 1, 2023 06:04:02 UTC)
66.3394°N 154.652°W Depth 5.5 miles (8 km)

This event has been reviewed by a seismologist

58 miles (94 km) W of Allakaket
66 miles (107 km) NE of Huslia
72 miles (116 km) SE of Kobuk
78 miles (126 km) SE of Shungnak
90 miles (145 km) SW of Bettles
101 miles (163 km) SE of Ambler
109 miles (176 km) NW of Tanana
113 miles (183 km) N of Ruby
114 miles (184 km) W of Pump Station #5
129 miles (209 km) NE of Galena
133 miles (215 km) NE of Koyukuk
224 miles (363 km) NW of Fairbanks

Magnitude type: M_l²
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. Together with the North Slope, this seismic zone produces a few magnitude 4-5 earthquakes per year.