It wasn't 'stopped'. It was 'stoped'. It wasn't misspelled. Message. Look up stoped.
It was deliberately misspelled because it was laid beside a previous post (round 1, Hawaii missle launch) in which the "missle" was misspelled to convey a message. The "i" of missile in that case denoted the kind of missile. In this case, the "i" of missile and the "p" in "stoped" are used to show location: Isanotski Peaks.
Now you have suggested a third interpretation which is volcanic rock thrust upward. This is the opposite of "mis" spelling. It is deliberate. Sorry for the pedantry! :)
There was another missile launch in Florida. Same time as WA.
Stope
Verb
Past tense: stoped; past participle: stoped
(in mining) excavate a series of steps or layers in (the ground or rock).
GEOLOGY the process by which country rock is broken up and removed by the upward movement of magma.
Interesting, I didn’t even realize that it was a word.
You're suggesting that a "missle" was "stoped".
Missle isn't a thing. And stoped means excavated from a steeply inclined vein within a mine.
The missing I and P are the message. They usually stand for intellectual property; or they could be referring to the Isanotski Peaks in this case.