Temporal variability of explosive activity at Tajogaite volcano, Cumbre Vieja (Canary Islands), 2021 eruption from ground-based infrared photography and videography

Frontiers in Earth Science

Earth Science

Sonia Calvari¹  María Asensio-Ramos²  David Calvo²  Fátima Rodríguez²  Pedro A. Hernandez³  Luca D’Auria³  José Barrancos³  Germán D. Padilla³  Nemesio M. Pérez³  Einat Lev⁴  Janine Birnbaum⁴ 

[1] Instituto Tecnológico y de Energías Renovables (ITER), Tenerife, Canary Islands, Spain;Instituto Volcanológico de Canarias (INVOLCAN), Tenerife, Canary Islands, Spain;Instituto Volcanológico de Canarias (INVOLCAN), Tenerife, Canary Islands, Spain;Instituto Tecnológico y de Energías Renovables (ITER), Tenerife, Canary Islands, Spain;Lamont-Doherty Earth Observatory, Columbia University, New York City, NY, United States;

关键词: IR camera;    thermal photography;    strombolian;    Hawaiian fountaining;    volcanic plume;    velocimetry;    Cumbre Vieja volcano;   

DOI  :  10.3389/feart.2023.1193436

 received in 2023-03-24, accepted in 2023-08-29,  发布年份 2023

来源: Frontiers

【 摘 要 】

The 2021 eruption at Tajogaite (Cumbre Vieja) volcano (La Palma, Spain) was characterized by Strombolian eruptions, Hawaiian fountaining, white gas-dominated and grey ash-rich plumes, and lava effusion from multiple vents. The variety of eruptive styles displayed simultaneously and throughout the eruption presents an opportunity to explore controls on explosivity and the relationship between explosive and effusive activity. Explosive eruption dynamics were recorded using ground-based thermal photography and videography. We show results from the analysis of short (<5 min) near-daily thermal videos taken throughout the eruption from multiple ground-based locations and continuous time-lapse thermal photos over the period November 16 to November 26. We measure the apparent radius, velocity, and volume flux of the high-temperature gas-and-ash jet and lava fountaining behaviors to investigate the evolution of the explosive activity over multiple time scales (seconds-minutes, hours, and days-weeks). We find fluctuations in volume flux of explosive material that correlate with changes in volcanic tremor and hours-long increases in explosive flux that are immediately preceded by increases in lava effusion rate. Correlated behavior at multiple vents suggests dynamic magma ascent pathways connected in the shallow (tens to hundreds of meters) sub-surface. We interpret the changes in explosivity and the relative amounts of effusive and explosivity to be the result of changes in gas flux and the degree of gas coupling.

【 授权许可】

Unknown   
Copyright © 2023 Birnbaum, Lev, Hernandez, Barrancos, Padilla, Asensio-Ramos, Calvo, Rodríguez, Pérez, D’Auria and Calvari.