Sangay volcano (Ecuador): the opening of two new vents, a drumbeat seismic sequence and a new lava flow in late 2021

Silvana  Hidalgo; Francisco  Vásconez; Jean  Battaglia; Benjamin  Bernard; Pedro  Espín; Sébastien  Valade; María-Fernanda  Naranjo; Robin  Campion; Josué  Salgado; Marco  Córdova; Marco  Almeida; Stephen  Hernández; Gerardo  Pino; Elizabeth  Gaunt; Andrew Bell; Patricia Mothes; Mario Ruiz

doi:10.30909/vol.05.02.295311

Sangay volcano (Ecuador): the opening of two new vents, a drumbeat seismic sequence and a new lava flow in late 2021

Silvana Hidalgo , Francisco Vásconez , Jean Battaglia , Benjamin Bernard , Pedro Espín , Sébastien Valade , María-Fernanda Naranjo , Robin Campion , Josué Salgado , Marco Córdova , Marco Almeida , Stephen Hernández , Gerardo Pino , Elizabeth Gaunt , Andrew Bell, Patricia Mothes , Mario Ruiz

School of Geosciences

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Abstract / Description of output

On 2 December, 2021 we recorded a sequence of drumbeat seismic events at Sangay volcano. This sequence lasted several hours and resulted in two explosive emissions whose eruptive columns reached 9 km above crater. Unexpectedly, these explosions did not produce any ash fallout in the inhabited areas around the volcano. This drumbeat sequence was produced after a series of morphological changes, including the opening of two new vents (W and N) and a landslide. These occurred during an enhanced period of ground deformation and degassing. Further analysis of satellite images allowed us to determine that this sequence was associated with the widening of the recently open vent north of the main crater, and the extrusion of a new lava flow. Timely communication of this event to the authorities and the population was ensured by the IG-EPN by following internal protocols. The corresponding short reports reached more than 300,000 people.

Original language	English
Journal	Volcanica
Volume	5
Issue number	2
DOIs	https://doi.org/10.30909/vol.05.02.295311
Publication status	Published - 14 Oct 2022

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https://www.jvolcanica.org/ojs/index.php/volcanica/article/view/157Licence: Creative Commons: Attribution (CC-BY)

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Hidalgo , S., Vásconez , F., Battaglia , J., Bernard , B., Espín , P., Valade , S., Naranjo , M.-F., Campion , R., Salgado , J., Córdova , M., Almeida , M., Hernández , S., Pino , G., Gaunt , E., Bell, A., Mothes , P., & Ruiz, M. (2022). Sangay volcano (Ecuador): the opening of two new vents, a drumbeat seismic sequence and a new lava flow in late 2021. Volcanica, 5(2). https://doi.org/10.30909/vol.05.02.295311

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title = "Sangay volcano (Ecuador): the opening of two new vents, a drumbeat seismic sequence and a new lava flow in late 2021",

abstract = "On 2 December, 2021 we recorded a sequence of drumbeat seismic events at Sangay volcano. This sequence lasted several hours and resulted in two explosive emissions whose eruptive columns reached 9 km above crater. Unexpectedly, these explosions did not produce any ash fallout in the inhabited areas around the volcano. This drumbeat sequence was produced after a series of morphological changes, including the opening of two new vents (W and N) and a landslide. These occurred during an enhanced period of ground deformation and degassing. Further analysis of satellite images allowed us to determine that this sequence was associated with the widening of the recently open vent north of the main crater, and the extrusion of a new lava flow. Timely communication of this event to the authorities and the population was ensured by the IG-EPN by following internal protocols. The corresponding short reports reached more than 300,000 people.",

author = "Silvana Hidalgo and Francisco V{\'a}sconez and Jean Battaglia and Benjamin Bernard and Pedro Esp{\'i}n and S{\'e}bastien Valade and Mar{\'i}a-Fernanda Naranjo and Robin Campion and Josu{\'e} Salgado and Marco C{\'o}rdova and Marco Almeida and Stephen Hern{\'a}ndez and Gerardo Pino and Elizabeth Gaunt and Andrew Bell and Patricia Mothes and Mario Ruiz",

year = "2022",

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doi = "10.30909/vol.05.02.295311",

language = "English",

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Hidalgo , S, Vásconez , F, Battaglia , J, Bernard , B, Espín , P, Valade , S, Naranjo , M-F, Campion , R, Salgado , J, Córdova , M, Almeida , M, Hernández , S, Pino , G, Gaunt , E, Bell, A, Mothes , P & Ruiz, M 2022, 'Sangay volcano (Ecuador): the opening of two new vents, a drumbeat seismic sequence and a new lava flow in late 2021', Volcanica, vol. 5, no. 2. https://doi.org/10.30909/vol.05.02.295311

TY - JOUR

T1 - Sangay volcano (Ecuador): the opening of two new vents, a drumbeat seismic sequence and a new lava flow in late 2021

AU - Hidalgo , Silvana

AU - Vásconez , Francisco

AU - Battaglia , Jean

AU - Bernard , Benjamin

AU - Espín , Pedro

AU - Valade , Sébastien

AU - Naranjo , María-Fernanda

AU - Campion , Robin

AU - Salgado , Josué

AU - Córdova , Marco

AU - Almeida , Marco

AU - Hernández , Stephen

AU - Pino , Gerardo

AU - Gaunt , Elizabeth

AU - Bell, Andrew

AU - Mothes , Patricia

AU - Ruiz, Mario

PY - 2022/10/14

Y1 - 2022/10/14

N2 - On 2 December, 2021 we recorded a sequence of drumbeat seismic events at Sangay volcano. This sequence lasted several hours and resulted in two explosive emissions whose eruptive columns reached 9 km above crater. Unexpectedly, these explosions did not produce any ash fallout in the inhabited areas around the volcano. This drumbeat sequence was produced after a series of morphological changes, including the opening of two new vents (W and N) and a landslide. These occurred during an enhanced period of ground deformation and degassing. Further analysis of satellite images allowed us to determine that this sequence was associated with the widening of the recently open vent north of the main crater, and the extrusion of a new lava flow. Timely communication of this event to the authorities and the population was ensured by the IG-EPN by following internal protocols. The corresponding short reports reached more than 300,000 people.

AB - On 2 December, 2021 we recorded a sequence of drumbeat seismic events at Sangay volcano. This sequence lasted several hours and resulted in two explosive emissions whose eruptive columns reached 9 km above crater. Unexpectedly, these explosions did not produce any ash fallout in the inhabited areas around the volcano. This drumbeat sequence was produced after a series of morphological changes, including the opening of two new vents (W and N) and a landslide. These occurred during an enhanced period of ground deformation and degassing. Further analysis of satellite images allowed us to determine that this sequence was associated with the widening of the recently open vent north of the main crater, and the extrusion of a new lava flow. Timely communication of this event to the authorities and the population was ensured by the IG-EPN by following internal protocols. The corresponding short reports reached more than 300,000 people.

U2 - 10.30909/vol.05.02.295311

DO - 10.30909/vol.05.02.295311

M3 - Article

VL - 5

JO - Volcanica

JF - Volcanica

IS - 2

ER -

Sangay volcano (Ecuador): the opening of two new vents, a drumbeat seismic sequence and a new lava flow in late 2021

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