Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas
International audience Deep long-period (DLP) earthquakes observed beneath active volcanoes are sometimes considered as precursors to eruptions. Their origin remains, however, unclear. Here, we present a possible DLP generating mechanism related to the rapid growth of gas bubbles in response to the...
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Online Access: | https://hal.archives-ouvertes.fr/hal-02914641 https://hal.archives-ouvertes.fr/hal-02914641/document https://hal.archives-ouvertes.fr/hal-02914641/file/Melnik_etal_NatComm2020.pdf https://doi.org/10.1038/s41467-020-17759-4 |
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ftccsdartic:oai:HAL:hal-02914641v1 2023-05-15T16:59:11+02:00 Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas Melnik, Oleg Lyakhovsky, Vladimir SHAPIRO, Nikolaï Galina, Natalia Bergal-Kuvikas, Olga Lomonosov Moscow State University (MSU) Institut des Sciences de la Terre (ISTerre) Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA) Institute of Volcanology and Seismology of the RAS Far Eastern Branch of the Russian Academy of Sciences (FEB RAS) 2020 https://hal.archives-ouvertes.fr/hal-02914641 https://hal.archives-ouvertes.fr/hal-02914641/document https://hal.archives-ouvertes.fr/hal-02914641/file/Melnik_etal_NatComm2020.pdf https://doi.org/10.1038/s41467-020-17759-4 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-020-17759-4 hal-02914641 https://hal.archives-ouvertes.fr/hal-02914641 https://hal.archives-ouvertes.fr/hal-02914641/document https://hal.archives-ouvertes.fr/hal-02914641/file/Melnik_etal_NatComm2020.pdf doi:10.1038/s41467-020-17759-4 info:eu-repo/semantics/OpenAccess ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.archives-ouvertes.fr/hal-02914641 Nature Communications, Nature Publishing Group, 2020, 11, pp.3918. ⟨10.1038/s41467-020-17759-4⟩ [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1038/s41467-020-17759-4 2021-11-07T00:48:57Z International audience Deep long-period (DLP) earthquakes observed beneath active volcanoes are sometimes considered as precursors to eruptions. Their origin remains, however, unclear. Here, we present a possible DLP generating mechanism related to the rapid growth of gas bubbles in response to the slow decompression of over-saturated magma. For certain values of the gas and bubble content, the elastic deformation of surrounding rocks forced by the expanding bubbly magma can be fast enough to generate seismic waves. We show that amplitudes and frequencies of DLP earthquakes observed beneath the Klyuchevskoy volcano (Kamchatka, Russia) can be predicted by our model when considering pressure changes of~10 7 Pa in a volume of~10 3-10 4 m 3 and realistic magma compositions. Our results show importance of the deep degassing in the generation of volcanic seismicity and suggest that the DLP swarms beneath active volcanoes might be related to the pulses of volatile-rich basaltic magmas rising from the mantle. Article in Journal/Newspaper Kamchatka Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Nature Communications 11 1 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology |
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[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology Melnik, Oleg Lyakhovsky, Vladimir SHAPIRO, Nikolaï Galina, Natalia Bergal-Kuvikas, Olga Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas |
topic_facet |
[SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology |
description |
International audience Deep long-period (DLP) earthquakes observed beneath active volcanoes are sometimes considered as precursors to eruptions. Their origin remains, however, unclear. Here, we present a possible DLP generating mechanism related to the rapid growth of gas bubbles in response to the slow decompression of over-saturated magma. For certain values of the gas and bubble content, the elastic deformation of surrounding rocks forced by the expanding bubbly magma can be fast enough to generate seismic waves. We show that amplitudes and frequencies of DLP earthquakes observed beneath the Klyuchevskoy volcano (Kamchatka, Russia) can be predicted by our model when considering pressure changes of~10 7 Pa in a volume of~10 3-10 4 m 3 and realistic magma compositions. Our results show importance of the deep degassing in the generation of volcanic seismicity and suggest that the DLP swarms beneath active volcanoes might be related to the pulses of volatile-rich basaltic magmas rising from the mantle. |
author2 |
Lomonosov Moscow State University (MSU) Institut des Sciences de la Terre (ISTerre) Institut national des sciences de l'Univers (INSU - CNRS)-Institut de recherche pour le développement IRD : UR219-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Gustave Eiffel-Université Grenoble Alpes (UGA) Institute of Volcanology and Seismology of the RAS Far Eastern Branch of the Russian Academy of Sciences (FEB RAS) |
format |
Article in Journal/Newspaper |
author |
Melnik, Oleg Lyakhovsky, Vladimir SHAPIRO, Nikolaï Galina, Natalia Bergal-Kuvikas, Olga |
author_facet |
Melnik, Oleg Lyakhovsky, Vladimir SHAPIRO, Nikolaï Galina, Natalia Bergal-Kuvikas, Olga |
author_sort |
Melnik, Oleg |
title |
Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas |
title_short |
Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas |
title_full |
Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas |
title_fullStr |
Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas |
title_full_unstemmed |
Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas |
title_sort |
deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-02914641 https://hal.archives-ouvertes.fr/hal-02914641/document https://hal.archives-ouvertes.fr/hal-02914641/file/Melnik_etal_NatComm2020.pdf https://doi.org/10.1038/s41467-020-17759-4 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.archives-ouvertes.fr/hal-02914641 Nature Communications, Nature Publishing Group, 2020, 11, pp.3918. ⟨10.1038/s41467-020-17759-4⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-020-17759-4 hal-02914641 https://hal.archives-ouvertes.fr/hal-02914641 https://hal.archives-ouvertes.fr/hal-02914641/document https://hal.archives-ouvertes.fr/hal-02914641/file/Melnik_etal_NatComm2020.pdf doi:10.1038/s41467-020-17759-4 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41467-020-17759-4 |
container_title |
Nature Communications |
container_volume |
11 |
container_issue |
1 |
_version_ |
1766051387461861376 |