Scientists studying a recent volcano came up with a grandly Infocultish metaphor to describe one aspect of eruptions. They scream just before exploding.
It's is the sound made by the mountain as it trembles.
Those quakes continuously rose in pitch like a volcanic glissando - a musical glide from one pitch to another...
"Because there's less time between each earthquake, there's not enough time to build up enough pressure for a bigger one. After the frequency glides up to a ridiculously high frequency, it pauses and then it explodes."
Infocult: listening to the earth as it screams.