Santiago R Arellano¹, Emma Liu², Kieran Wood³, Alessandro Aiuppa⁴, Alfredo Allan⁵, Marcello Bitetto⁶, Nicole Bobrowski⁷, Simon A Carn⁸, Robert Clarke⁹, Ernesto Corrales⁵, Jorge Andres Diaz¹⁰, Marie Edmonds¹¹, Tobias P Fischer¹², Jim E Freer¹³, Matthew Fricke¹⁴, Bo Galle¹, Gustav Gerdes¹⁵, Gaetano Giudice¹⁶, Jarett Jones¹⁴, Alexandra Gutmann¹⁷, Emily Mason¹⁸, Brendan McCormick¹⁹, Kila Mulina²⁰, Scott Nowicki¹⁴, Thomas Richardson³, Julian Rüdiger¹⁷, Ian Schipper²¹, Matthew Watson²², Matthew Wordell²³ and Zach Voss²⁴, (1)Chalmers University of Technology, Gothenburg, Sweden, (2)University of Cambridge, Earth Sciences, Cambridge, United Kingdom, (3)University of Bristol, Aerospace Engineering, Bristol, BS8, United Kingdom, (4)Università di Palermo, Dipartimento di Scienze della Terra e del Mare (DiSTeM), Palermo, Italy, (5)Gas Lab, CICANUM, Universidad de Costa Rica, San Jose, Costa Rica, (6)University of Palermo, Palermo, Italy, (7)University of Heidelberg, Heidelberg, Germany, (8)Michigan Technological University, Department of Geological and Mining Engineering & Sciences, Houghton, MI, United States, (9)University of Bristol, Aerospace Engineering, Bristol, United Kingdom, (10)Universidad de Costa Rica, San Jose, Costa Rica, (11)University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, (12)University of New Mexico, Department of Earth and Planetary Sciences, Albuquerque, NM, United States, (13)University of Bristol, Geographical Sciences, Bristol, United Kingdom, (14)University of New Mexico, Albuquerque, NM, United States, (15)Gerdes Solutions, Stockholm, Sweden, (16)Istituto Nazionale di Geofisica e Vulcanologia, Palermo, Italy, (17)Johannes Gutenberg University of Mainz, Institute of Inorganic and Analytical Chemistry, Mainz, Germany, (18)University of Cambridge, Cambridge, United Kingdom, (19)University of Manchester, Manchester, United Kingdom, (20)Rabaul Volcano Observatory, Rabaul, Papua New Guinea, (21)Victoria University of Wellington, Wellington, New Zealand, (22)University of Bristol, Earth Sciences, Bristol, United Kingdom, (23)Freelance photographer, Boise, ID, United States, (24)Retroscope Media, Boise, ID, United States