the lava was settled inside the volcano for years waiting to burst and destroy Pompeii
in Pompeii before the eruption it was calm and no one knew it was coming.
At around 8.15 pm on the first day the it began. Boiling lava and burning rocks came crashing from the sky and began to destroy the houses. then ash filled the sky. As more ash fell it began to clog the air making it difficult to breath, for the people of Pompeii
Next, devastation really hit. A surge of molten rock and super heated poisonous gas poured down the mountain swallowing everything and everyone in its path.
after all of that the eruption started to slow down and pouring out molten lava.
By the time the eruption ended a few days later, the whole city of Pompeii was buried under millions of tons of volcanic ash.