Body: "Volcanoes and earthquakes" is the examination of the movement of tectonic plates, geology.
tectonic plates, magma, movement are a few categories of "Volcanoes and earthquakes".
Professionals of "Volcanoes and earthquakes" include Harry Glicken, David A. Johnston.
Why study "Volcanoes and earthquakes"? learn about the movement of tectonic plates, prepare emergency services.