Probabilistic tsunami hazard and risk analysis: A cookbook

This open-access book presents a comprehensive overview of probabilistic tsunami hazard and risk assessment (PTHA and PTRA), a field that has advanced rapidly over the past 10–15 years and now underpins many tsunami risk-mitigation efforts. Drawing on approaches originally developed for earthquake risk assessment, the book highlights how tsunami risk differs by involving multiple, cascading workflows rather than a single analytical process. Developed with support from the COST Action CA18109 AGITHAR (2019–2023), the volume reflects the contributions of more than 120 experts, including over 50 who volunteered to develop a practical “cookbook” for PTHA and PTRA.

The book aims to synthesize existing methods, clarify and harmonize key workflows, and share examples of best practice with a broad audience. Using a cookbook analogy, it outlines the core components of PTHA and PTRA and illustrates how these elements can be combined into well-designed workflows for specific applications. While it encourages methodological consistency, it does not impose rigid standardization, instead allowing flexibility for further innovation. The publication is intended for scientists, practitioners, and decision-makers involved in tsunami hazard and risk reduction.