👉 Vulcanicity is a geological phenomenon where magma from an igneous rock falls into a void in the Earth's crust, causing it to expand and solidify. This process is called "volcanic erosion" or "volcanic insolation." When this magma rises up through the Earth's surface, it can cause the surrounding rock to crack and deform, creating a large opening called a volcano. The term "vulcanicity" refers to the fact that volcanic eruptions are often
