4-4-4-4-4-4-4-4-4-4-4-4-4 From: Matteo Roverato <matteoroverato1809@xxxxxxxxx> Dear colleagues, I'm extremely pleased to announce that after 2.5 years of hard work, our book "*V**olcanic Debris Avalanches: From Collapse to Hazard"* is now available for the scientific community. The book is published in the "advances in volcanology" book series by Springer: https://link.springer.com/book/10.1007/978-3-030-57411-6 This book presents state-of-the-art ideas of volcanic debris avalanches (VDAs), which are produced by partial volcanic edifice collapse, one of the most impressive volcanic phenomena. It has been 40 years since the volcanic debris avalanche associated with the 1980 eruption of Mount St. Helens, and our understanding of these events has grown considerably in the interim. The book begins with an historical review of VDAs prior to 1980 and continues with an overview of the terminology, size, and geomorphological characteristics, the factors controlling volcano instability, and the possible climatic influences related to these events. Special attention is given to sedimentology as a key to interpreting their origin and mobility. Computer simulations are presented as a complementary tool to detailed geological mapping. Finally, the current understanding of lateral collapse processes in volcanic island and submarine environments, and an overview of volcaniclastic ring plains sedimentation in active volcanic settings complete the book. We, editors, acknowledge the unquestionable efforts of all researchers that contributed to the understanding of volcanic lateral collapse and debris avalanches before and after the seminal event of Mount St. Helens volcano. We are particularly grateful to all the authors present in the book that made this manuscript possible. A special thank goes also to all reviewers that helped to improve the book. Best regards Matteo Roverato, Anja Dufresne, Jonathan Procter *Editors* 4-4-4-4-4-4-4-4-4-4-4-4-4 ------------------------------
