A magma chamber is a large underground pool of liquid rock found beneath the surface of the Earth. The molten rock in such a chamber is under great pressure, and given enough time, that pressure can gradually fracture the rock around it creating outlets for the magma. If it finds a way to the surface, then the result will be a volcanic eruption; consequently many volcanoes are situated over magma chambers. Magma chambers are hard to detect, and most of the known ones are therefore close to the surface of the Earth, commonly between 1 km and 10 km under the surface. In geological terms this is extremely close to the surface, although in human terms it is considerably deep underground.
Volcanoes have fascinated human beings since the dawn of time; thankfully, now we know enough not to think of them as powerful earth/fire gods, but to understand them as the magnificent phenomena they are. However, there are still many things we still haven’t been able to figure out them, and even if we would have, [...]