Recurrence of Deep Long-Period Earthquakes beneath the Klyuchevskoi Volcano Group, Kamchatka
International audience Abstract—Long-period earthquakes and tremors, on a par with volcano-tectonic earthquakes, are one of two main classes of volcano-seismic activity. It is believed that long-period volcanic seismicity is associated with pressure fluctuations in the magmatic and hydrothermal syst...
Published in: | Izvestiya, Physics of the Solid Earth |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03594475 https://doi.org/10.1134/S1069351320060026 |
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ftuniveiffel:oai:HAL:insu-03594475v1 2023-05-15T16:58:57+02:00 Recurrence of Deep Long-Period Earthquakes beneath the Klyuchevskoi Volcano Group, Kamchatka Galina, N. A. Shapiro, N. M. Droznin, D. V. Droznina, S. Ya. Senyukov, S. L. Chebrov, D. V. 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) 2020 https://hal-insu.archives-ouvertes.fr/insu-03594475 https://doi.org/10.1134/S1069351320060026 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1134/S1069351320060026 insu-03594475 https://hal-insu.archives-ouvertes.fr/insu-03594475 BIBCODE: 2020IzPSE.56.749G doi:10.1134/S1069351320060026 Izvestiya https://hal-insu.archives-ouvertes.fr/insu-03594475 Izvestiya, 2020, 56, pp.749-761. ⟨10.1134/S1069351320060026⟩ graph of frequency-magnitude relationship of earthquakes volcanic seismicity long-period earthquakes moment magnitude statistical analysis [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2020 ftuniveiffel https://doi.org/10.1134/S1069351320060026 2023-03-25T21:49:07Z International audience Abstract—Long-period earthquakes and tremors, on a par with volcano-tectonic earthquakes, are one of two main classes of volcano-seismic activity. It is believed that long-period volcanic seismicity is associated with pressure fluctuations in the magmatic and hydrothermal systems beneath volcanoes and can therefore be used as a precursor of the impending eruptions. At the same time, the physical mechanism of the long-period seismicity is still not fully understood. In this work, we have studied the long-period earthquakes that occur at the crust-mantle boundary beneath the Klyuchevskoi volcanic group in Kamchatka in order to establish their recurrence law—the relationship between the magnitude and frequency of occurrence of the events. In the region under study, the earthquakes pertaining to this type are most numerous and characterize the state of the deep magma reservoir located at the crust-mantle boundary. The changes in the seismic regime in this part of the magmatic system can be one of the early precursors of eruptions. For a more thorough characterization of the frequency-magnitude relationship of the discussed events, we compiled a new catalog of the deep long-period earthquakes based on the matched-filter processing of continuous seismograms recorded by the network stations of the Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences in 2011-2012. For these earthquakes, we also used a magnitude determination method that provides the estimates close to the moment magnitude scale. The analysis of the obtained catalog containing more than 40 000 events shows that the frequency-magnitude relationships of the earthquakes markedly deviate from the Gutenberg-Richter power-law distribution, probably testifying to the seismicity mechanism and peculiarities of the sources that differ from the common tectonic earthquakes. It is shown that the magnitude distribution of the deep long-period earthquakes is, rather, described by the distributions with characteristic ... Article in Journal/Newspaper Kamchatka HAL Univ-Eiffel (Université Gustave Eiffel) Izvestiya, Physics of the Solid Earth 56 6 749 761 |
institution |
Open Polar |
collection |
HAL Univ-Eiffel (Université Gustave Eiffel) |
op_collection_id |
ftuniveiffel |
language |
English |
topic |
graph of frequency-magnitude relationship of earthquakes volcanic seismicity long-period earthquakes moment magnitude statistical analysis [SDU]Sciences of the Universe [physics] |
spellingShingle |
graph of frequency-magnitude relationship of earthquakes volcanic seismicity long-period earthquakes moment magnitude statistical analysis [SDU]Sciences of the Universe [physics] Galina, N. A. Shapiro, N. M. Droznin, D. V. Droznina, S. Ya. Senyukov, S. L. Chebrov, D. V. Recurrence of Deep Long-Period Earthquakes beneath the Klyuchevskoi Volcano Group, Kamchatka |
topic_facet |
graph of frequency-magnitude relationship of earthquakes volcanic seismicity long-period earthquakes moment magnitude statistical analysis [SDU]Sciences of the Universe [physics] |
description |
International audience Abstract—Long-period earthquakes and tremors, on a par with volcano-tectonic earthquakes, are one of two main classes of volcano-seismic activity. It is believed that long-period volcanic seismicity is associated with pressure fluctuations in the magmatic and hydrothermal systems beneath volcanoes and can therefore be used as a precursor of the impending eruptions. At the same time, the physical mechanism of the long-period seismicity is still not fully understood. In this work, we have studied the long-period earthquakes that occur at the crust-mantle boundary beneath the Klyuchevskoi volcanic group in Kamchatka in order to establish their recurrence law—the relationship between the magnitude and frequency of occurrence of the events. In the region under study, the earthquakes pertaining to this type are most numerous and characterize the state of the deep magma reservoir located at the crust-mantle boundary. The changes in the seismic regime in this part of the magmatic system can be one of the early precursors of eruptions. For a more thorough characterization of the frequency-magnitude relationship of the discussed events, we compiled a new catalog of the deep long-period earthquakes based on the matched-filter processing of continuous seismograms recorded by the network stations of the Kamchatka Branch of the Geophysical Survey of the Russian Academy of Sciences in 2011-2012. For these earthquakes, we also used a magnitude determination method that provides the estimates close to the moment magnitude scale. The analysis of the obtained catalog containing more than 40 000 events shows that the frequency-magnitude relationships of the earthquakes markedly deviate from the Gutenberg-Richter power-law distribution, probably testifying to the seismicity mechanism and peculiarities of the sources that differ from the common tectonic earthquakes. It is shown that the magnitude distribution of the deep long-period earthquakes is, rather, described by the distributions with characteristic ... |
author2 |
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) |
format |
Article in Journal/Newspaper |
author |
Galina, N. A. Shapiro, N. M. Droznin, D. V. Droznina, S. Ya. Senyukov, S. L. Chebrov, D. V. |
author_facet |
Galina, N. A. Shapiro, N. M. Droznin, D. V. Droznina, S. Ya. Senyukov, S. L. Chebrov, D. V. |
author_sort |
Galina, N. A. |
title |
Recurrence of Deep Long-Period Earthquakes beneath the Klyuchevskoi Volcano Group, Kamchatka |
title_short |
Recurrence of Deep Long-Period Earthquakes beneath the Klyuchevskoi Volcano Group, Kamchatka |
title_full |
Recurrence of Deep Long-Period Earthquakes beneath the Klyuchevskoi Volcano Group, Kamchatka |
title_fullStr |
Recurrence of Deep Long-Period Earthquakes beneath the Klyuchevskoi Volcano Group, Kamchatka |
title_full_unstemmed |
Recurrence of Deep Long-Period Earthquakes beneath the Klyuchevskoi Volcano Group, Kamchatka |
title_sort |
recurrence of deep long-period earthquakes beneath the klyuchevskoi volcano group, kamchatka |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03594475 https://doi.org/10.1134/S1069351320060026 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Izvestiya https://hal-insu.archives-ouvertes.fr/insu-03594475 Izvestiya, 2020, 56, pp.749-761. ⟨10.1134/S1069351320060026⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1134/S1069351320060026 insu-03594475 https://hal-insu.archives-ouvertes.fr/insu-03594475 BIBCODE: 2020IzPSE.56.749G doi:10.1134/S1069351320060026 |
op_doi |
https://doi.org/10.1134/S1069351320060026 |
container_title |
Izvestiya, Physics of the Solid Earth |
container_volume |
56 |
container_issue |
6 |
container_start_page |
749 |
op_container_end_page |
761 |
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1766051085952221184 |