GNGTS 2021 - Atti del 39° Convegno Nazionale

105 GNGTS 2021 S essione 1.2 SEISMIC ATTENUATION DURING MAGMA VESICULATION: A COMBINATION OF LABORATORY CONSTRAINTS AND MODELING M. Pistone 1 , J.L. Fife 2 , N. Tisato 3 , L. Caricchi 4 , E. Reusser 5 , P. Ulmer 5 , K. Mader 6 , F. Marone 6 1 Department of Geology, University of Georgia, Athens, Georgia, United States of America 2 The Fifedom, Inc. and Grant Engine, Cary, North Carolina, United States of America 3 Jackson School of Geosciences, The University of Texas at Austin, Austin, Texas, United States of America 4 Department of Earth Sciences, University of Geneva, Geneva, Switzerland 5 Department of Earth Sciences, ETH-Zurich, Zurich, Switzerland 6 Swiss Light Source, Paul Scherrer Institut, Villigen, Switzerland Assessing the potential and likelihood of explosive eruptions is vital for almost 800 million people living near active volcanoes. Magma reservoirs are not directly accessible, limiting our capability to understand the prerequisites for an explosive eruption and our ability to perform Fig. 1 - In situ lab-scale reservoir experiment of sample vesiculation. A–D) Orthoslices from the 3D sample with gas bubbles (black) and glass/melt (light gray). E) Exploded view of panel C with yellow arrows indicating representative regions of bubble impingement. F) Seismic attenuation model based upon the experimental observations reporting the frequency range of natural volcanic tremors in gray. b = bubble volume fraction; r = bubbleradius.FigureandcaptionfromPistoneetal.(2021),GRL48, https://doi.org/10.1029/2020GL092315 .