Experiments on the Effect of Particle Concentration and Size on Settling-Driven Gravitational Instabilities Associated with Volcanic Clouds

Allan Fries1, Paul Jarvis1, Jonathan Lemus1, Costanza Bonnadona1, Amanda B Clarke2,3, Jeremy Phillips4 and Irene Manzella5, (1)University of Geneva, Geneva, Switzerland, (2)Arizona State University, Tempe, AZ, United States, (3)Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, Pisa, Italy, (4)University of Bristol, Bristol, United Kingdom, (5)University of Plymouth, Plymouth, United Kingdom