Craters and calderas are depressions formed by volcanic activity. A crater is a funnel-shaped vent at the top of a volcano formed by eruptions. A caldera is a much larger, basin-shaped depression created when a volcano’s summit collapses inward following ...
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While water vapor makes up the majority (up to 90%) of volcanic gases, the remaining significant components are Sulfur dioxide (SO2), Carbon dioxide (CO2) and Nitrogen (N2). Smaller amounts of hydrogen sulfide and carbon monoxide are also common. These gases ...
The molten material present beneath the solid rocks of the Earth’s crust is called magma. It exists at very high temperatures and contains molten rock, gases, and minerals. During a volcanic eruption, this magma rises through cracks in the crust ...
A Dormant volcano is often called a “sleeping volcano.” It is a volcano that has not erupted for a long time but has the potential to erupt again in the future. These are particularly dangerous because they can appear peaceful ...
An Extinct volcano is one that scientists consider unlikely to erupt again because the volcano no longer has a magma supply. These volcanoes have not shown any signs of eruption for thousands of years and have no historical record of ...