Borah Peak

Seismologists say the region has an earthquake about that size every 30 or 40 years, and the previous one - a magnitude 7.0 near Borah Peak in 1983 - killed two children in Challis and caused an estimated $12.5 million in property damage.

Large earthquakes like the 1959 Hebgen Lake quake and the 1983 Borah Peak quake altered the iconic geyser’s activity, decreasing the frequency of its eruptions, Hurwitz said.

It was the most powerful earthquake since a 6.9-magnitude struck Borah Peak in 1983, killing two people, according to the Statesman.

Koper and Pang cited the examples of the 1983 Borah Peak earthquake in central Idaho which sent out aftershocks as late as 2017.

The 56-year-old combat veteran reported being halfway down the south side of 12,667-foot Borah Peak and hypothermic.