HELENA — This month marks 90 years since one of Montana's most destructive recorded seismic events.

For months, Helena shook. Hundreds of buildings and homes were destroyed, and four people died as a result.

MTN takes a deeper look at the history of that fateful fall during the Great Depression, we speak with some of the last Helenans left who can remember the event and look at the science behind why the tremors caused so much damage.

History of the 1935 Helena Earthquake - Click here for the full story

At the time, the Big Shake of 1935 was the fifth most destructive earthquake in U.S. history.

Marian Davidson breaks down what happened 90 years ago and hears from residents who lived through the event. History of the 1935 Earthquake

Memories of The Big Shake - Click Here for he full

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