Pressure within not only cause.
Pressure without equally relevant.
Neg pressure from gravitational distortions.
Neg pressure from changing atmosphere.
Neg pressure from lowering sea levels.
Eruption might NOT cause cooling.
Cooling might be dt neg atmospheric pressure.
And neg pressure might cause MANY things.
For example, for men—relief from hypertensive effect that enslaves men to women unwillingly.
And for women, significantly reduced lifespan as men become increasingly immune to the vampiric effect that creates hypertension in target victims.