The 2021 eruption of the Cumbre Vieja volcanic ridge on La Palma, Canary Islands
Por:
Carracedo J.C., Troll V.R., Day J.M.D., Geiger H., Aulinas M., Soler V., Deegan F.M., Perez-Torrado F.J., Gisbert G., Gazel E., Rodriguez-Gonzalez A., Albert H.
Publicada:
1 ene 2022
Resumen:
Almost exactly half a century after the eruption of the Teneguía Volcano on La Palma (26 October to 28 November 1971), a new eruption occurred on the island and lasted for 85 days from 19 September until 13 December 2021. This new eruption opened a volcanic vent complex on the western flank of the Cumbre Vieja rift zone, the N-S elongated polygenetic volcanic ridge that has developed on La Palma over the last c. 125 ka. The Cumbre Vieja ridge is the volcanically active region of the island and the most active one of the Canary Islands, hosting half of all the historically recorded eruptive events in the archipelago. The 2021 La Palma eruption has seen no direct loss of human life, thanks to efficient early detection and sensible management of the volcanic crisis by the authorities, but more than 2800 buildings and almost 1000 hectares of plantations and farmland were affected by lava flows and pyroclastic deposits. Satellite surveillance enabled accurate mapping of the progressive buildup of the extensive and complex basaltic lava field, which together with monitoring of gas emissions informed the timely evacuation of local populations from affected areas. Lava flows that reached the sea constructed an extensive system of lava deltas and platforms, similar to events during earlier historical eruptions such as in 1712, 1949 and 1971. Long-term challenges in the aftermath of the eruption include protection of drainage systems from potential redistribution of tephra during high rainfall events, the use of the large surplus quantities of ash in reconstruction of buildings and in agriculture, and the crucial concerns of where and how rebuilding should and could occur in the aftermath of the eruption. Finally, there remain strong financial concerns over insurance for properties consumed or damaged by the eruption in the light of future volcanic hazards from the Cumbre Vieja volcanic ridge. © John Wiley & Sons Ltd, The Geologists' Association & The Geological Society of London.
Filiaciones:
Carracedo J.C.:
Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain
Troll V.R.:
Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain
Department of Earth Sciences, Natural Resources & Sustainable Development (NRHU), Uppsala University, Uppsala, Sweden
Day J.M.D.:
Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States
Geiger H.:
Institute of Earth and Environmental Sciences, University of Freiburg, Freiburg im Breisgau, Germany
Aulinas M.:
Departamento de Mineralogia, Petrologia i Geologia Aplicada, University of Barcelona, Barcelona, Spain
Soler V.:
IPNA-CSIC, Tenerife, Spain
Deegan F.M.:
Department of Earth Sciences, Natural Resources & Sustainable Development (NRHU), Uppsala University, Uppsala, Sweden
Perez-Torrado F.J.:
Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain
Gisbert G.:
Instituto de Geociencias, CSIC-UCM, Madrid, Spain
Gazel E.:
Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, United States
Rodriguez-Gonzalez A.:
Instituto de Estudios Ambientales y Recursos Naturales (i-UNAT), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain
Albert H.:
Departamento de Mineralogia, Petrologia i Geologia Aplicada, University of Barcelona, Barcelona, Spain
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