volcanic eruption, causes, types, effects and preparedness
Deep in the earth, its temperatures are hot enough for a lot more rocks to melt slowly to become a dense fluid called magma. Because it's heavier than solid rock, magma rises and accumulates in magma chambers. Eventually, some magma will reach Earth through cracks in a vent. Magmas that explode are called lavas. Occasionally the eruption has been explosive but not all. Explosions depend upon a magmatic composition in the eruption. When magma is thin, gases may escape easily. In case a magma eruption occurs it is discharged from a volcano. Several examples of volcanic eruptions are in Hawaii. What is formed during volcanic eruptions are called lava flows? A volcano releases some of its hot gases when it erupts, creating smaller but powerful explosions that can travel for thousands or even millions (or hundreds) miles through the Earth's atmosphere and land below. As these molten gas particles move up into the stratosphere they expand rapidly—and explode explosively at high al...