Magnitude 0.8 - 19 miles W of Haines Junction
July 31, 2020 05:13:46 AKDT (July 31, 2020 13:13:46 UTC)
60.8314°N 138.0771°W Depth 9.8 miles (15 km)
This event has been reviewed by a seismologist
- 38 miles (61 km) SE of Burwash Landing
- 103 miles (167 km) W of Whitehorse
- 106 miles (171 km) NE of Yakutat
- 125 miles (202 km) NW of Klukwan
- 135 miles (218 km) NW of Skagway
- 137 miles (222 km) NE of Icy Bay
- 143 miles (231 km) NW of Haines
- 157 miles (254 km) E of Cape Yakataga
- 163 miles (264 km) SE of Chisana
- 167 miles (270 km) E of McCarthy
- 186 miles (301 km) NW of Gustavus
- 217 miles (351 km) NW of Juneau
- Magnitude type: Ml2
- Event type: earthquake
Tectonic Setting of the Denali Fault
The Denali Fault is a major intracontinental right-lateral strike-slip fault that partially accommodates the oblique collision of the Yakutat block into Alaska's margin, extending from northwestern British Columbia to the central and western regions of Alaska. The largest earthquake recorded on the Denali Fault was a M7.9 on November 3, 2002. Its rupture extended for nearly 270 miles (435 km) along the central Denali Fault system. This event was preceded by the M6.7 Nenana Mountain Earthquake on October 23, which ruptured 25 miles (40 km) of the Denali Fault west of the M7.9 event. It is typical behavior of these major right-lateral faults in the Interior to produce very low background levels of seismicity between large ruptures hundreds of years apart that are followed by multi-year aftershock sequences. Another notable feature associated with the Denali Fault system is the Kantishna seismic cluster, located just north of the main fault trace inside Denali National Park. This cluster produces tens of small, shallow earthquakes every day. The largest known earthquakes in this cluster are on the order of magnitude 5, but those are rare. This cluster is believed to accommodate deformation between the Denali Fault and the Minto Flats Seismic Zone to the north.