In the newly revised second edition of Fundamentals of Physical Volcanology, the authors provide a comprehensive introduction to the processes that control when and how volcanoes erupt. The book addresses all aspects of modern volcanology, from petrology and geochemistry to rock physics, fluid dynamics and thermodynamics. With the help of new and improved illustrations, this new edition explains eruption types and mechanisms, subsurface processes, volcanic eruption products, and how volcanoes affect their surrounding environment.