Others think they may be big bubbles of bio gas escaping from lakes. Some scientists have attempted to explain the noises as coronal mass ejections from the sun striking our atmosphere, or gas erupting from the inside of the earth. And a few days later in 1805, Lewis records that some of the Native-American reported hearing the same thing, and that they were common in the Black Hills as well. Seneca Lake, New York has the "Seneca guns," described as being virtually identical to the Great Falls noises. Some call them "mistpouffers" or "skyquakes," but they are described as being like guns nearly everywhere they are reported. And the area around Great Falls isn't the only place in America that hears similar noises. But Montana in 1805 certainly didn't have any gun big enough to make a noise like that, nor did it have anything that would repeatedly produce a sonic boom. It's worth pointing out here that the six-pound ordinance compared to the sound by Lewis and Clark was a big cannon that had to be driven around on wheels, field artillery - meaning that this was a loud noise, you understand.įurther trappers and settlers would confirm the sound, an explosive report comparable to a sonic boom. Ultimately, Lewis was left to state that "I am at a loss to account for this phenomenon." However, this noise was "sometimes heard once only and at other times, six or seven discharges in quick succession." Lewis first assumed it was water accumulating and suddenly emptying in a cavern somewhere in the nearby mountains, but then reasoned that something like that would discharge regularly. They could find no explanation for the sounds. a rumbling like Cannon at a great distance is heard to the west if us the Cause we Can't account."
I was informed of it by the men several times before I paid any attention to it, thinking it was thunder most probably which they had mistaken"Ĭlark corroborates, writing about ". of West as loud and resembling precisely the discharge of a piece of ordinance of 6 pounds at the distance of three miles. Lewis describes it thus: "since our arrival at the falls we have repeatedly witnessed a nois which proceeds from a direction a little to the N. On the fourth of July in 1805, as the Corps of Discovery reached the Great Falls of the Missouri and began the arduous task of portaging them, the journals of the explorers report something strange.
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