Volcanic bombs

Main article: volcanic bomb
Volcanic bombs are extrusive igneous rocks that range from the size of a book to small automobile, that are explosively ejected from Stratovolcanoes during their peak eruptive phases. These bombs can travel over fifteen miles (20 km) away from the volcano and present a risk to buildings and people while traveling at very high speeds (hundreds of miles per hour or km/h) through the air. The bombs do not themselves explode on impact, but rather carry enough force so as to have destructive effects as if they exploded