Magnitude 6.4 - 55 miles SW of Kaktovik

August 12, 2018 06:58:53 AKDT (August 12, 2018 14:58:53 UTC)
69.5762°N 145.291°W Depth 9.8 miles (15 km)

View this event in the USGS Combined Catalog (ComCat)

79 miles (128 km) E of Pump Station #2
86 miles (139 km) SE of Deadhorse
86 miles (139 km) SE of Prudhoe Bay
92 miles (149 km) SE of Pump Station #1
101 miles (163 km) N of Arctic Village
101 miles (163 km) NE of Pump Station #3
129 miles (209 km) NE of Pump Station #4
166 miles (269 km) E of Umiat
180 miles (291 km) N of Venetie
189 miles (306 km) NE of Anaktuvuk Pass
193 miles (312 km) NE of Wiseman

Magnitude type: M_w²
Event type: N/A

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.

Contributed by:
¹Alaska Earthquake Center
²USGS National Earthquake Information Center
Learn more about magnitude types here