THE EYE CRATERVolcanic craters are depressions at the tops of volcanoes. They form through explosive eruptions that can blow out the volcano's summit, magma withdrawal causing collapses, or erosion over time. Craters range in size and shape, with larger ones called calderas. They help scientists study volcanic history, materials ejected during eruptions, and geologic processes. Monitoring craters is essential for assessing volcanic hazards and understanding active volcanoes.