Time evolution of the magmatic intrusion below La Palma before eruption

Fernández, José; Escayo, Joaquín; Camacho, Antonio; Palano, Mimmo; Prieto, Juan Francisco; Hu, Zhongbo; Samsonov, Sergey; Tiampo, K. F.; Ancochea, Eumenio

doi:10.5194/egusphere-egu22-7341

Cited by 2 publications

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“…Data sets generated and/or analyzed in this study are available in Fernández et al. (2024). Defsour® software for inversion of LOS data (Fernández et al., 2022) is available under request to the authors using a transfer agreement, for volcano monitoring and research, excluding commercial applications.…”

Section: Data Availability Statementmentioning

confidence: 99%

Volcanic Unrest After the 2021 Eruption of La Palma

Fernández,

Escayo,

Prieto

et al. 2024

Geophysical Research Letters

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La Palma, Canary Islands, had its largest historical eruption in 2021. From January 2022 to May 2023 there were >2,100 seismic events, primarily at depths ≤20 km, prompting us to update the deformation and modeling study, using interferometric synthetic aperture radar observations and a last generation interpretation tool. We detect the evolution of the remaining magmatic body in the SW portion of the island, with arrival of new magma moving into the oceanic crust out to sea, and a pressurized zone in the central‐eastern area, at regions of structural weakness. The current source characteristics have some similarities to the early stage dynamics prior to the 2021 eruption. Operational and multidisciplinary studies must continue to monitor either their stabilization or growth and destabilization. The ability to identify magma ascent using only deformation data over short time periods allows us to characterize unrest patterns and provide new insights into volcanic processes.

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Section: Data Availability Statementmentioning

confidence: 99%

Volcanic Unrest After the 2021 Eruption of La Palma

Fernández,

Escayo,

Prieto

et al. 2024

Geophysical Research Letters

Self Cite

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“…It was not until the recent magmatic unrest at Cumbre Vieja volcano in 2021 that concerns about the possibility of volcano collapse at La Palma reawoke and sparked interest in the scientific community (González, 2022) and the public. The number of scientific publications (Periáñez, 2021;Fernández et al, 2022;González, 2022;Romero et al, 2022) and conference abstracts (Geersen et al, 2023;Miranda-Hardisson et al, 2023;Rodríguez-Losada et al, 2023;Walter et al, 2023) addressing flank instability or collapse at La Palma increased during the 19 months following the eruption. In contrast, only three references were published during the equivalent preceding period (Abadie et al, 2020;Arnaud et al, 2021;Fernández et al, 2021).…”

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confidence: 99%

Are eruptions reliable precursors to marine volcano collapses?

et al. 2023

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Volcanoes are sources of numerous threats including lava flows, pyroclastic flows, ash dispersal and landslides or sector collapses. In addition to these commonly known volcanic hazards, volcano-induced tsunamis can occur in the marine environment, introducing a major hazard that can affect populations located far away from the volcanoes. Existing tsunami warning systems generally do not account for volcano-generated tsunamis, due to the multiple source mechanisms that can cause such tsunamis, a limited understanding of precursory signals for these events, and the need for local detection rather than remote sensing. Among these source mechanisms of volcanic tsunamis, sector and lateral collapses are at the high risk-low frequency extreme of risk matrices. Marine volcanoes grow in specific environments, with factors like marine clays, constant full saturation, sediment transport and remobilization, interaction with ocean dynamics, and sea level changes that may impact edifice stability in distinct ways. The majority of historically documented marine volcano collapses occurred at erupting volcanoes, suggesting that eruptions could serve as a remotely detectable warning signal for collapses. However, careful examination of temporal sequences of these examples reveals that collapses do not always follow eruptions. Consequently, there is a need for identifying other, more robust precursors to volcano collapse, in particular in the marine environment, where the consequences of collapses may be widespread.

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Time evolution of the magmatic intrusion below La Palma before eruption

Cited by 2 publications

References 0 publications

Volcanic Unrest After the 2021 Eruption of La Palma

Volcanic Unrest After the 2021 Eruption of La Palma

Are eruptions reliable precursors to marine volcano collapses?

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