1. Introduction -- 2. How the Earth moves. Magma, minerals and rocks -- Compositional layering of the Earth's interior -- Mechanical layering of the Earth's interior -- Plate tectonics, earthquakes and magma generation -- Volcanoes and plate boundaries -- Partial melting -- 3. Eruptions. Magma migration and magma rise -- How rising magma evolves -- Volcano plumbing -- Eruptions -- Eruption triggers -- The sizes of eruptions -- Eruption frequency and duration -- Non-erupting active volcanoes -- Dormant or extinct? -- 4. Types of volcano. Composite cone volcanoes -- Collapsing volcanoes -- Shield volcanoes -- Monogenetic features -- Calderas -- Subglacial volcanoes -- Undersea volcanoes -- 5. Volcanic hazards. Lava flows -- Pyroclastic flows -- Fallout -- Eruption clouds and air traffic -- Debris avalanches -- Volcanogenic tsunamis -- Lahars -- Jokulhlaups -- Gases and air pollution -- 6. Volcanoes and climate. Recent volcanic climate disturbances -- Volcanoes and human history -- Toba -- Supervolcanoes -- Continental flood basalts and mass extinctions -- 7. Monitoring volcanoes. Volcano observatories -- Seismic monitoring -- Microgravity monitoring -- Magnetic and electric monitoring -- Infrasound -- Lahar warnings -- Gas analyses -- Thermal monitoring -- Remote sensing -- 8. Living with volcanoes. Why live near a volcano? -- Benefits of volcanoes -- Volcanic hazards and volcanic risk -- Warnings and crisis management -- Getting it right -- Disasters in the making? -- 9. Tectonic earthquakes. Faults and earthquakes -- Focus, epicentre and seismic waves -- Measuring earthquakes -- Global seismic monitoring -- Prediction and warning -- Preventing earthquakes? -- 10. Living with earthquakes. Notable earthquakes -- Fatalities from earthquakes and volcanic eruptions compared -- Engineering for resilience -- Earthquake preparedness -- 11. Tsunamis. What is a tsunami? -- Seismogenic tsunamis -- Recent seismogenic tsunamis -- Tsunami warning systems -- Tsunami risk mitigation -- Landslide tsunamis -- Impact tsunamis.