Source mechanisms of volcanic tsunamis

Area of Science:

• Geophysics
• Natural Hazards
• Volcanology

Background:

• Volcanic tsunamis result from various geological processes, including earthquakes, pyroclastic flows, and caldera collapse.
• These events generate diverse wave characteristics, complicating hazard assessment and numerical modeling.
• Effective monitoring and warning systems for volcanic tsunamis are still under development.

Purpose of the Study:

• To review past volcanic tsunami events and analyze the influence of key parameters on tsunami generation.
• To highlight challenges in integrating diverse source data for numerical tsunami models and hazard maps.
• To emphasize the need for enhanced monitoring, scientific development, and public preparedness strategies.

Main Methods:

• Review of historical volcanic tsunami events and associated geological mechanisms.
• Analysis of influential parameters such as mass flow volume, explosion energy, and collapse duration.
• Discussion of challenges in wave data harmonization for modeling and hazard mapping.

Main Results:

• Volcanic tsunami generation is linked to a wide array of phenomena, each with distinct impacts.
• Parameter variations significantly influence tsunami characteristics, affecting predictability.
• Data heterogeneity hinders the development of unified numerical models and probabilistic hazard assessments.

Conclusions:

• Lessons from past volcanic tsunamis underscore the complexity of tsunami generation and wave behavior.
• Integrated approaches combining scientific advancements, improved monitoring, and robust preparedness policies are essential.
• Addressing the diversity of volcanic tsunami sources is critical for effective hazard mitigation and public safety.