Magnitude 2.5 - 42 miles S of Kantishna
September 11, 2023 21:54:19 AKDT (September 12, 2023 05:54:19 UTC)
62.9213°N 151.1685°W Depth 68.6 miles (111 km)
This event has been reviewed by a seismologist
- 53 miles (85 km) NW of Talkeetna
- 67 miles (108 km) N of Skwentna
- 73 miles (118 km) SE of Telida
- 75 miles (121 km) SE of Lake Minchumina
- 76 miles (123 km) SW of Cantwell
- 83 miles (134 km) SW of Denali Park
- 89 miles (144 km) NW of Willow
- 94 miles (152 km) SW of Healy
- 99 miles (160 km) NW of Hatcher Pass
- 100 miles (162 km) NE of Hayes Volcano
- 100 miles (162 km) E of Nikolai
- 125 miles (202 km) N of Anchorage
- 169 miles (274 km) SW of Fairbanks
- 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.