Temporal variations of repeating low frequency volcanic earthquakes at Ngauruhoe Volcano, New Zealand

Park, Iseul; Jolly, Arthur D.; Kim, Ki Young; Kennedy, Ben

doi:10.1016/j.jvolgeores.2019.01.024

Cited by 24 publications

(29 citation statements)

References 42 publications

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“…Alternatively, given generally shallow levels of LP radiation on Gorely, groundwaters may be involved in two-phase 'steam and water' resonator system in a similar way that was proposed for Ngauruhoe volcano in New Zealand [52,53]. The climate of Kamchatka with a heavy snow cover of volcanoes over a half-year and the glaciation of Pra-Gorely caldera both support this version.…”

Section: Discussionmentioning

confidence: 78%

Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013

et al. 2020

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Gorely is one of the most active volcanoes in Kamchatka with a rich magmatic and eruptive history reflected in its composite structure. In 2013–2014, a temporary network of 20 seismic stations was installed on Gorely for one year. During the four months of its high degassing rate, seismic activity was mostly expressed in the form of a long-period (LP) seismic tremor. In this study, we have developed a workflow based on the combination of back-projection (BP), cluster analysis, and matched-filter (MF) methods. By applying it to continuous seismic records for the study period, we were able to identify discrete LP events within the tremor sequence automatically and individually investigate their properties. A catalog obtained using the BP detection algorithm consist of 1741 high-energy events. Cluster analysis revealed that the entire variety of LP earthquakes in this catalog could be grouped into five families, which are sequentially organized in time. Utilizing templates of these families in the MF search resulted in the complementary catalog of 80,615 low-energy events. The long-term occurrence of highly repetitive LP events in the same location may correspond to resonating conduits behaving in response to the high-pressure gases flowing from the decompressed magma chamber up to the volcano’s crater.

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Section: Discussionmentioning

confidence: 78%

Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013

et al. 2020

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“…Shallow hydrothermal systems have been linked to the generation of long-lasting families of earthquakes at ice-or snow-covered volcanoes (e.g. Matoza et al, 2015;Park et al, 2019). Here, the interplay of hydrothermal fluids with seasonal meltwater from above may lead to repeated over-pressurization and failure of a constricted volume within the fluid pathways of an extensive crack system.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, the interaction of meltwater from ice or snow with magmatic hydrothermal fluids can generate shallow low-frequency seismicity (e.g. Matoza et al, 2015;Park et al, 2019). Most or all of these mechanisms have been documented or surmised to occur in case studies at multiple glacial volcanoes (Weaver and Malone, 1976;Métaxian et al, 2003;Caplan-Auerbach and Huggel, 2007;Jónsdóttir et al, 2009;Thelen et al, 2013;Allstadt and Malone, 2014).…”

Section: Introductionmentioning

confidence: 99%

Investigating potential icequakes at Llaima volcano, Chile

Lamb¹,

Lees²,

Marı́n³

et al. 2019

Preprint

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Glacially- and magmatically-derived seismic events have been noted to heavily overlap in characteristics, thus there exists the potential for false-alarms or missed warnings at ice-covered volcanoes. Here we present the first study to specifically target icequakes at an ice-covered volcano in Southern Chile. Two months of broadband seismic data collected at Llaima volcano in 2015 were analyzed in order to quantify, characterize, and locate glacially-derived seismic events at one of the most active ice-covered volcanoes in the region. We find over 1,000 repeating seismic events across 11 families, the largest of which contains 397 events. Approximate locations and characteristics of the largest families lead us to conclude that these events were derived from persistent stick-slip motion along the ice-rock interface at the base of a glacier near the volcano summit. These results have implications for future seismic monitoring at Llaima volcano and other ice-covered active volcanoes in the region.

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“…In addition, the interaction of meltwater from ice or snow with magmatic hydrothermal fluids can generate shallow low-frequency seismicity [e.g. Matoza et al 2015;Park et al 2019]. Most or all of these mechanisms have been documented or surmised to occur in case studies at multiple glacial volcanoes [Allstadt and Malone 2014;Caplan-Auerbach and Huggel 2007;Jónsdóttir et al 2009;Métaxian et al 2003;Thelen et al 2013;Weaver and Malone 1976].…”

Section: Introductionmentioning

confidence: 99%

Investigating potential icequakes at Llaima volcano, Chile

Lamb¹,

Lees

Franco-Marin³

et al. 2020

Volcanica

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Glacially-and magmatically-derived seismic events have been noted to heavily overlap in their characteristics, thus there exists the potential for false-alarms or missed warnings at ice-covered volcanoes. Here we present the first study to specifically investigate icequakes at an ice-covered volcano in Southern Chile. Two months of broadband seismic data collected at Llaima volcano in 2015 were analyzed in order to quantify, characterize, and locate potential glacially-derived seismic events at one of the most active ice-covered volcanoes in the region. We find over 1,000 repeating seismic events across 11 families, the largest of which contains 397 events. Approximate locations and characteristics of the largest families lead us to conclude that these events were derived from persistent stick-slip motion along the ice-rock interface at the base of a glacier near the volcano summit. These results have implications for future seismic monitoring at Llaima volcano and other ice-covered active volcanoes in the region. Resumen Se ha observado que los fenómenos sísmicos derivados de los glaciares y magmáticos se superponen en gran medida en las características, por lo que existe la posibilidad de que se produzcan falsas alarmas o de que se pasen por alto las alertas en los volcanes cubiertos de hielo. Aquí presentamos el primer estudio que apunta específicamente a los terremotos en un volcán cubierto de hielo en el sur de Chile. Se analizaron dos meses de datos sísmicos de banda ancha recolectados en el volcán Llaima en 2015 para cuantificar, caracterizar y localizar eventos sísmicos derivados de glaciares en uno de los volcanes cubiertos de hielo más activos de la región. Encontramos más de 1,000 eventos sísmicos repetidos en 11 familias, el más grande de los cuales contiene 397 eventos. Las ubicaciones y características aproximadas de las familias más grandes nos llevan a la conclusión de que estos eventos se derivaron de un movimiento persistente de stick-slip a lo largo de la interfase de la roca de hielo en la base de un glaciar cerca de la cima del volcán. Estos resultados tienen implicaciones para el futuro monitoreo sísmico en el volcán Llaima y otros volcanes activos cubiertos de hielo en la región.

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Temporal variations of repeating low frequency volcanic earthquakes at Ngauruhoe Volcano, New Zealand

Cited by 24 publications

References 42 publications

Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013

Clustering of Long-Period Earthquakes Beneath Gorely Volcano (Kamchatka) during a Degassing Episode in 2013

Investigating potential icequakes at Llaima volcano, Chile

Investigating potential icequakes at Llaima volcano, Chile

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