Vyacheslav M. Zobin’s Introduction to Volcanic Seismology has steadily grown over time, offering a deeper look at the latest developments in volcanic seismology with each edition. As such, this new, fully updated fourth edition is simply titled Volcanic Seismology in a nod to the comprehensive nature it has achieved. Volcanic Seismology, Fourth Edition, covers all aspects of volcano seismology, specifically focusing on the latest studies and developments. This new edition expands to include recent seismic events in Kilauea (2018), La Soufriere (2020), and Hunga Tonga (2022). This book begins with an introduction and review of the fundamentals of volcanic seismology. After setting this foundation, several case studies in volcano-tectonic earthquakes are reviewed. This is followed by a detailed look at earthquake swarms, source properties and origins, and volcanic tremors. Different seismic signals are closely examined. The author then explores effusive and explosive activity along with lave dome growth and destruction. The book closes with an in-depth look at seismic monitoring as well as the natural seismicity of geothermal structures within volcanic environments. This essential text provides seismologists, volcanologists, and geophysicists a comprehensive review of all aspects of volcanic seismology.