Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Breathing of the Nevado del Ruiz volcano reservoir, Colombia, inferred from repeated seismic tomography. / Vargas, Carlos A.; Koulakov, Ivan; Jaupart, Claude и др.
в: Scientific Reports, Том 7, 46094, 10.04.2017, стр. 46094.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Breathing of the Nevado del Ruiz volcano reservoir, Colombia, inferred from repeated seismic tomography
AU - Vargas, Carlos A.
AU - Koulakov, Ivan
AU - Jaupart, Claude
AU - Gladkov, Valery
AU - Gomez, Eliana
AU - El Khrepy, Sami
AU - Al-Arifi, Nassir
N1 - Publisher Copyright: © The Author(s) 2017.
PY - 2017/4/10
Y1 - 2017/4/10
N2 - Nevado del Ruiz volcano (NRV), Columbia, is one of the most dangerous volcanoes in the world and caused the death of 25,000 people in 1985. Using a new algorithm for repeated tomography, we have found a prominent seismic anomaly with high values of the Vp/Vs ratio at depths of 2-5 km below the surface, which is associated with a shallow magma reservoir. The amplitude and shape of this anomaly changed during the current phase of unrest which began in 2010. We interpret these changes as due to the ascent of gas bubbles through magma and to degassing of the reservoir. In 2011-2014, most of this gas escaped through permeable roof rocks, feeding surface fumarole activity and leading to a gradual decrease of the Vp/Vs ratio in the reservoir. This trend was reversed in 2015-2016 due to replenishment of the reservoir by a new batch of volatile-rich magma likely to sustain further volcanic activity. It is argued that the recurring "breathing" of the shallow reservoir is the main cause of current eruptions at NRV.
AB - Nevado del Ruiz volcano (NRV), Columbia, is one of the most dangerous volcanoes in the world and caused the death of 25,000 people in 1985. Using a new algorithm for repeated tomography, we have found a prominent seismic anomaly with high values of the Vp/Vs ratio at depths of 2-5 km below the surface, which is associated with a shallow magma reservoir. The amplitude and shape of this anomaly changed during the current phase of unrest which began in 2010. We interpret these changes as due to the ascent of gas bubbles through magma and to degassing of the reservoir. In 2011-2014, most of this gas escaped through permeable roof rocks, feeding surface fumarole activity and leading to a gradual decrease of the Vp/Vs ratio in the reservoir. This trend was reversed in 2015-2016 due to replenishment of the reservoir by a new batch of volatile-rich magma likely to sustain further volcanic activity. It is argued that the recurring "breathing" of the shallow reservoir is the main cause of current eruptions at NRV.
KW - 13 NOVEMBER 1985
KW - BENEATH
KW - ERUPTION
KW - GAS
KW - LAHARS
KW - MAGMA CHAMBER
KW - MODEL
UR - http://www.scopus.com/inward/record.url?scp=85017311059&partnerID=8YFLogxK
U2 - 10.1038/srep46094
DO - 10.1038/srep46094
M3 - Article
C2 - 28393851
AN - SCOPUS:85017311059
VL - 7
SP - 46094
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 46094
ER -
ID: 10041365