S08 - Hybrid eruptive activity: understanding simultaneous explosive and effusive eruption processes
- Andrea Todde*, Università di Cagliari, Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo.
Laura Pioli, Università di Cagliari, Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo.
Simona Scollo, Istituto Nazionale di Geofisica e Vulcanologia, Osservatorio Etneo, Catania, Questo indirizzo email è protetto dagli spambots. È necessario abilitare JavaScript per vederlo. - *Corresponding
This session aims to discuss the many aspects of hybrid eruptive activity. A hybrid eruption or eruption phase can be defined as a mixed, explosive–effusive, eruptive activity during which magma is simultaneously erupted as both lava and tephra. While the triggering mechanisms are still poorly understood, and comprehensive models are lacking, there is growing evidence suggesting that hybrid eruption phases are common features of eruptions of both mafic and silicic magmas, with recent examples at Cumbre Vieja (2021), Spain, and Cordón Caulle (2011), Chile.
Many key themes still need to be addressed to better understand this type of activity, for example: how do magma ascent and conduit-vent geometry affect hybrid activity? Are there peculiar fragmentation processes and limits to explosivity? How well can we identify the products of a hybrid activity associated to unwitnessed eruptions? Finally, what dedicated risk reduction plans should be implemented for hybrid eruption crisis and how this translates to eruption scenarios at active volcanoes?
We welcome contributions covering the (i) dynamics, (ii) product analysis (iii) volcanic hazards and impact, and (iv) main characterization through monitoring and direct observation strategies to enhance discussions on the recent advancements and knowledge of hybrid activity.