Progressive reactivation of the volcanic plumbing system beneath Tolbachik volcano (Kamchatka, Russia) revealed by long-period seismicity
International audience After lying dormant for 36 yr, the Tolbachik volcano of the Klyuchevskoy group started to erupt on 27 November 2012. We investigate the preparatory phase of this eruption via a statistical analysis of the temporal behavior of long-period (LP) earthquakes that occurred beneath...
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ftinsu:oai:HAL:insu-03589346v1 2023-06-18T03:41:31+02:00 Progressive reactivation of the volcanic plumbing system beneath Tolbachik volcano (Kamchatka, Russia) revealed by long-period seismicity Frank, William B. Shapiro, Nikolaï M. Gusev, Alexander A. Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) 2018 https://hal-insu.archives-ouvertes.fr/insu-03589346 https://doi.org/10.1016/j.epsl.2018.04.018 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2018.04.018 insu-03589346 https://hal-insu.archives-ouvertes.fr/insu-03589346 BIBCODE: 2018E&PSL.493.47F doi:10.1016/j.epsl.2018.04.018 ISSN: 0012-821X Earth and Planetary Science Letters https://hal-insu.archives-ouvertes.fr/insu-03589346 Earth and Planetary Science Letters, 2018, 493, pp.47-56. ⟨10.1016/j.epsl.2018.04.018⟩ eruptive cycle long-period earthquakes volcanic plumbing system point process [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2018 ftinsu https://doi.org/10.1016/j.epsl.2018.04.018 2023-06-05T20:49:51Z International audience After lying dormant for 36 yr, the Tolbachik volcano of the Klyuchevskoy group started to erupt on 27 November 2012. We investigate the preparatory phase of this eruption via a statistical analysis of the temporal behavior of long-period (LP) earthquakes that occurred beneath this volcanic system. The LP seismicity occurs close to the surface beneath the main volcanic edifices and at 30 km depth in the vicinity of a deep magmatic reservoir. The deep LP earthquakes and those beneath the Klyuchevskoy volcano occur quasi-periodically, while the LP earthquakes beneath Tolbachik are clustered in time. As the seismicity rate increased beneath Tolbachik days before the eruption, the level of the time clustering decreased. We interpret this as a manifestation of the evolution of the volcano plumbing system. We suggest that when a plumbing system awakes after quiescence, multiple cracks and channels are reactivated simultaneously and their interaction results in the strong time clustering of LP earthquakes. With time, this network of channels and cracks evolves into a more stable state with an overall increased permeability, where fluids flow uninhibited throughout the plumbing system except for a few remaining impediments that continue to generate seismic radiation. The inter-seismic source interaction and the level of earthquake time clustering in this latter state is weak. This scenario suggests that the observed evolution of the statistical behavior of the shallow LP seismicity beneath Tolbachik is an indicator of the reactivation and consolidation of the near-surface plumbing system prior to the Tolbachik eruption. The parts of the plumbing system above the deep magmatic reservoir and beneath the Klyuchevskoy volcano remain in nearly permanent activity, as demonstrated by the continuous occurrence of the deep LP earthquakes and very frequent Klyuchevskoy eruptions. This implies that these parts of the plumbing system remain in a stable permeable state and contain a few weakly interacting ... Article in Journal/Newspaper Kamchatka Institut national des sciences de l'Univers: HAL-INSU Tolbachik ENVELOPE(159.960,159.960,55.537,55.537) Earth and Planetary Science Letters 493 47 56 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
eruptive cycle long-period earthquakes volcanic plumbing system point process [SDU]Sciences of the Universe [physics] |
spellingShingle |
eruptive cycle long-period earthquakes volcanic plumbing system point process [SDU]Sciences of the Universe [physics] Frank, William B. Shapiro, Nikolaï M. Gusev, Alexander A. Progressive reactivation of the volcanic plumbing system beneath Tolbachik volcano (Kamchatka, Russia) revealed by long-period seismicity |
topic_facet |
eruptive cycle long-period earthquakes volcanic plumbing system point process [SDU]Sciences of the Universe [physics] |
description |
International audience After lying dormant for 36 yr, the Tolbachik volcano of the Klyuchevskoy group started to erupt on 27 November 2012. We investigate the preparatory phase of this eruption via a statistical analysis of the temporal behavior of long-period (LP) earthquakes that occurred beneath this volcanic system. The LP seismicity occurs close to the surface beneath the main volcanic edifices and at 30 km depth in the vicinity of a deep magmatic reservoir. The deep LP earthquakes and those beneath the Klyuchevskoy volcano occur quasi-periodically, while the LP earthquakes beneath Tolbachik are clustered in time. As the seismicity rate increased beneath Tolbachik days before the eruption, the level of the time clustering decreased. We interpret this as a manifestation of the evolution of the volcano plumbing system. We suggest that when a plumbing system awakes after quiescence, multiple cracks and channels are reactivated simultaneously and their interaction results in the strong time clustering of LP earthquakes. With time, this network of channels and cracks evolves into a more stable state with an overall increased permeability, where fluids flow uninhibited throughout the plumbing system except for a few remaining impediments that continue to generate seismic radiation. The inter-seismic source interaction and the level of earthquake time clustering in this latter state is weak. This scenario suggests that the observed evolution of the statistical behavior of the shallow LP seismicity beneath Tolbachik is an indicator of the reactivation and consolidation of the near-surface plumbing system prior to the Tolbachik eruption. The parts of the plumbing system above the deep magmatic reservoir and beneath the Klyuchevskoy volcano remain in nearly permanent activity, as demonstrated by the continuous occurrence of the deep LP earthquakes and very frequent Klyuchevskoy eruptions. This implies that these parts of the plumbing system remain in a stable permeable state and contain a few weakly interacting ... |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Frank, William B. Shapiro, Nikolaï M. Gusev, Alexander A. |
author_facet |
Frank, William B. Shapiro, Nikolaï M. Gusev, Alexander A. |
author_sort |
Frank, William B. |
title |
Progressive reactivation of the volcanic plumbing system beneath Tolbachik volcano (Kamchatka, Russia) revealed by long-period seismicity |
title_short |
Progressive reactivation of the volcanic plumbing system beneath Tolbachik volcano (Kamchatka, Russia) revealed by long-period seismicity |
title_full |
Progressive reactivation of the volcanic plumbing system beneath Tolbachik volcano (Kamchatka, Russia) revealed by long-period seismicity |
title_fullStr |
Progressive reactivation of the volcanic plumbing system beneath Tolbachik volcano (Kamchatka, Russia) revealed by long-period seismicity |
title_full_unstemmed |
Progressive reactivation of the volcanic plumbing system beneath Tolbachik volcano (Kamchatka, Russia) revealed by long-period seismicity |
title_sort |
progressive reactivation of the volcanic plumbing system beneath tolbachik volcano (kamchatka, russia) revealed by long-period seismicity |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03589346 https://doi.org/10.1016/j.epsl.2018.04.018 |
long_lat |
ENVELOPE(159.960,159.960,55.537,55.537) |
geographic |
Tolbachik |
geographic_facet |
Tolbachik |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
ISSN: 0012-821X Earth and Planetary Science Letters https://hal-insu.archives-ouvertes.fr/insu-03589346 Earth and Planetary Science Letters, 2018, 493, pp.47-56. ⟨10.1016/j.epsl.2018.04.018⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.epsl.2018.04.018 insu-03589346 https://hal-insu.archives-ouvertes.fr/insu-03589346 BIBCODE: 2018E&PSL.493.47F doi:10.1016/j.epsl.2018.04.018 |
op_doi |
https://doi.org/10.1016/j.epsl.2018.04.018 |
container_title |
Earth and Planetary Science Letters |
container_volume |
493 |
container_start_page |
47 |
op_container_end_page |
56 |
_version_ |
1769007130168262656 |