On This Fateful Day Idaho Was Victim To Its Largest Earthquake Ever
We don’t worry about earthquakes here in Idaho very much. This type of natural disaster just doesn’t occur here very often (besides the bizarre swarm of earthquakes we experienced this summer). However, that doesn’t mean earthquakes never strike in the Gem State. You might remember the day that one of Idaho’s most violent and terrifying earthquakes occurred. This event may have happened 34 years ago, but the memory of it still lingers today.

This event was one of the most intense natural disasters to strike Idaho and sadly resulted in two fatalities. The earthquake occurred in the Lost River Range. It began when a fracture 26 miles long and 7 miles deep surfaced along Mount Borah, the highest mountain in Idaho.

In Challis, two children were fatally crushed by falling debris as they walked to school that morning. Overall, it is estimated that the Challis-Mackay region suffered 12.5 million dollars in damage caused by the disaster.

The majority of buildings in Mackay's downtown region were damaged and many were ultimately condemned. The fact that many of these buildings were built from materials such as brick, concrete, and stone contributed to this. The region was simply not prepared for an earthquake of such an incredible magnitude.

These breaks made the ground look literally shattered, and some were measured to be up to 330 feet wide.


Although the effects were most intensely felt in Challis and Mackay, the earthquake was felt over a large portion of the northwestern United States and even in parts of Canada. It's estimated that there were at least 20 aftershocks (all with a magnitude of 4.0 or larger) in the year following the initial shock.

Do you remember this devastating earthquake? It’s crazy to think this occurred in Idaho! Did you know about this Deadly Historical Fire That Turned Idaho Into An Apocalyptic Wasteland?