How long does the Proterozoic Eon last for? 541 million years
1,500 million years
1,959 million years
543 million years

The first one 541 million years

Explosive eruptions are the most hazardous, involving large volumes of tephra and gases emitted from the volcano. lahars, pyroclastic flows, ashfall, and many other volcanic hazards are commonly associated with explosive eruptions. explosive eruptions are very dangerous. basically, any form of hazard can occur.