Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió acceptadaData de publicació
Llicència de publicació
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/226528
Unrest signals after 46 years of quiescence at Cumbre Vieja, La Palma, Canary Islands.
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
Monogenetic eruptions are the most common volcanic activity in the world. However, unrest monitoring data are scarce due to the long intervening quiescence periods. This study analyzes unrest signals recorded in one of the largest monogenetic fields in the Canary Islands, Cumbre Vieja (La Palma). Two seismic swarms were registered in October 2017 and February 2018 with b-values of 1.6 ± 0.1 and 2.3 ± 0.2 respectively suggesting an intense magmatic fluids contribution, gas and/or magma. Both swarms were linked to changes in gas emissions. Increases in hydrogen concentration, and (R/Ra)c up to 7.52 ± 0.05, were recorded before the first swarm, at the sampling point closest to where seismicity was located, indicating a deep gas input. After the second swarm, increases in (R/Ra)c and thoron soil concentration were recorded at two locations. This dataset is compatible with a stalled magmatic intrusion at ca. 25 km depth, with an estimated volume between 5.5·10−4 km3 and 3·10−2 km3.
Matèries
Citació
Citació
TORRES-GONZÁLEZ, P.a., LUENGO-OROZ, N., LAMOLDA, Héctor, D'ALESSANDRO, W., ALBERT MÍNGUEZ, Helena, IRIBARREN, I., MOURE-GARCÍA, D., SOLER, V.. Unrest signals after 46 years of quiescence at Cumbre Vieja, La Palma, Canary Islands.. _Journal of Volcanology and Geothermal Research_. 2020. Vol. 392, núm. 106757. [consulta: 21 de febrer de 2026]. ISSN: 0377-0273. [Disponible a: https://hdl.handle.net/2445/226528]