The Koyukuk Basin consists of accretion of volcanic arcs from the Middle Jurassic to Early Cretaceous.

P-wave analysis suggests that the earthquake was a result of thrust faulting at a depth of 6 km.

[6][7] Shaking from the earthquake reached VIII (Severe) on the Modified Mercalli intensity scale at its maximum within a radius of 40 to 50 miles.

An old building in Stevens Village was declared unsafe after it was seen that poles supporting its roof had split and broken.

Ice from a frozen river cracked and ground fissures opened at Tanana.