Mount Agung or Gunung Agung is a volcano in bail, Indonesia southeast of mt batur. If you don’t know what a volcano is its a rupture in the crust of the the earth that allows hot lava , volcano ashes and gases to escape from a magner chamber the surface. earth volacano occur because the crust is broken into 17 major rigid tectonic plates that float on a hotter ,softer layer in its mantle. Therefore, on earth volcanos are genrolly round were tectonic plates divering or convering and most are under water.