it erupted when magma ( lava ) and gases pushed the top off the mountain
It is not known.
in 1580
a
yes
Probably in a couple of million years since it takes a while for a volcano to errupt after it has already. I wouldn't worry! ;D
August, 2005
active
yes, it actually could
Volcano
the time of day
it could errupt and you burn to death
Mt.vesuvius does errupt often. hope this helped!