Crowd-sourcing observations of volcanic eruptions during the 2021 Fagradalsfjall and Cumbre Vieja events

Wadsworth, Fabian B.; Llewellin, Edward W.; Farquharson, Jamie; Gillies, Janina K; Loisel, Ariane; Frey, Léon; Ilyinskaya, Evgenia; Thordarson, T.; Tramontano, Samantha; Lev, Einat; Pankhurst, Matthew J.; Rull, Alejandro Galdeano; Asensio‐Ramos, María; Pérez, Nemesio M.; Hernández, Pedro A.; Calvo, David; Solana, M. Carmen; Kueppers, Ulrich; Santabárbara, Alejandro Polo

doi:10.1038/s41467-022-30333-4

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…On 19 September 2021, a new magmatic eruption started in the Cabeza de Vaca area, on the western flank of the Cumbre Vieja ridge, that lasted about 86 days; it was preceded by a few years of relatively deep (25–35 km) and low‐magnitude seismic activity, and by 1 week of intense seismic unrest and ground deformation (Carracedo et al., 2022; Civico et al., 2002a; Fernández et al., 2021; Romero et al., 2022a; Torres‐González et al., 2020; Wadsworth et al., 2022). The initial eruption vent gradually developed into an NW‐SE fissure, about 0.5‐km long, resulting from the emplacement of a westerly dipping feeding dyke, which represents an NW continuation of the normal faulting system associated with the 1949 eruption (Carracedo et al., 2022; González, 2022; Pankhurst et al., 2022).…”

Section: Introductionmentioning

confidence: 99%

Physical Characterization of Long‐Lasting Hybrid Eruptions: The 2021 Tajogaite Eruption of Cumbre Vieja (La Palma, Canary Islands)

et al. 2022

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Volcanic eruptions are commonly subdivided into effusive and explosive activity depending on conduit dynamics that can either result in the outflow of lava when the degassed magma reaches the surface (effusive eruptions), or in the fragmentation of magma at various depths (dry explosive eruptions, from Hawaiian to Ultra-Plinian, and wet explosive eruptions from Surtseyan to phreato-Plinian in the classification of Walker ( 1980)). Nonetheless, some

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Section: Introductionmentioning

confidence: 99%

Physical Characterization of Long‐Lasting Hybrid Eruptions: The 2021 Tajogaite Eruption of Cumbre Vieja (La Palma, Canary Islands)

et al. 2022

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“…This eruption is considered one of the largest that has occurred in La Palma. As the first sub-aerial eruption in the Canary Islands to be documented in detail (Wadsworth et al, 2022), it represents a major milestone in our understanding of volcanic activity in the region.…”

Section: Geological Settingmentioning

confidence: 99%

Insights into fluid migration during the 2021 La Palma eruption using seismic noise interferometry

Carvalho,

Silveira,

Mendes

et al. 2024

Front. Earth Sci.

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Ambient noise correlation analyses are largely used to monitor temporal medium changes generally associated with stress field variations and/or fluid movement. Here, we analyze the 2021 eruption of La Palma, the most active island in the Canary archipelago, to study its effects on the structure in a post-eruptive stage. To date, most of the studies, whether in volcanic environments or other geological systems, focus on determining seismic velocity changes that can be associated with precursory signals. In our study, we are interested in localizing the medium changes that permit constraining the depth of the most affected structure and suggesting possible mechanisms capable of inducing such alterations. The auto- and cross-correlation functions were computed using the phase cross-correlation strategy. The correlations were linearly stacked using a 3-day sliding window. The combination of these two approaches proved to render the best results. The analysis of 3 years of data resulted in the detection of occasional decorrelation before the eruption, followed by a well-defined decoherence period after the eruption. In addition, the relationship between the waveform correlation and lag time, using autocorrelations from before and after the eruption, permits identifying phase shifts and waveform distortion, which are sensitive to different parameters and, thus, have great importance in inferring the possible mechanism. Phase shifts occur when there is only velocity change without changing the structure, whereas waveform distortion is caused by a structural (geological) change. We also inferred the depths at which the most significant medium alterations occur. We observed that the decorrelation occurs at lag times corresponding to changes localized in depth. The surface structure appears to not have undergone significant medium changes for depths until approximately 8 km, either before or after the eruption.

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“…Esos discursos permiten una evolución de las percepciones y, en consecuencia, de las representaciones sociales que producen costumbres inéditas, amplificadas por nuevas tecnologías, facilidades para viajar, entre otros factores. Las erupciones de los volcanes Fagradalsfjáll (Islandia) y Cumbre Vieja (Isla La Palma, España) en 2021, que atrajeron personas de todo el mundo, en su mayoría turistas, entusiastas de los volcanes, fotógrafos, videógrafos, artistas, creadores de contenidos y pilotos de drones que dejaron un abundante acervo de imágenes y videos sobre la actividad eruptiva (Wadsworth et al, 2022). Sin embargo, este flujo inédito de personas motivado por el morbo y exacerbado por la prensa, contrastó con la realidad de los habitantes próximos a los volcanes que fueron afectados por la actividad eruptiva (p.…”

Section: Discussionunclassified

Percepciones en torno al volcanismo en Costa Rica (siglos XIX al XXI): De lo místico a lo profano, entre la curiosidad y el morbo

Mora,

Peraldo Huertas,

Cerdas Prado

2024

REDER

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Se analizan los discursos relativos a casos específicos de actividad volcánica en Costa Rica publicados en la prensa entre los siglos XIX y XXI, con el propósito de identificar cambios en la percepción hacia el volcanismo. Se constató cómo, a finales del siglo XIX e inicios del siglo XX, la percepción mística-religiosa hacia el volcanismo fue reemplazada paulatinamente por una visión profana y curiosa que permitió el surgimiento del turismo hacia los volcanes, pero también de noticias falsas y posicionamientos antagónicos de ciertos sectores frente a la ciencia. A finales del siglo XX e inicios del siglo XXI, el ciberespacio y las nuevas tecnologías facilitaron el crecimiento del morbo que hizo surgir el turismo ilegal en los volcanes. Estas tendencias de comportamiento social obligaron al Estado ejercer control sobre las nuevas actividades económicas mediante infraestructura y legislación que con el tiempo se deben ajustar a las nuevas necesidades y riesgos. El entendimiento de estas dinámicas culturales es fundamental para establecer estrategias que favorezcan una percepción del volcanismo científicamente fundada y permee en los procesos de gestión del riesgo de manera efectiva.

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Crowd-sourcing observations of volcanic eruptions during the 2021 Fagradalsfjall and Cumbre Vieja events

Cited by 10 publications

References 8 publications

Physical Characterization of Long‐Lasting Hybrid Eruptions: The 2021 Tajogaite Eruption of Cumbre Vieja (La Palma, Canary Islands)

Physical Characterization of Long‐Lasting Hybrid Eruptions: The 2021 Tajogaite Eruption of Cumbre Vieja (La Palma, Canary Islands)

Insights into fluid migration during the 2021 La Palma eruption using seismic noise interferometry

Percepciones en torno al volcanismo en Costa Rica (siglos XIX al XXI): De lo místico a lo profano, entre la curiosidad y el morbo

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