Asymmetric caldera-related structures in the area of the Avacha group of volcanoes in Kamchatka as revealed by ambient noise tomography and deep seismic sounding
International audience Avacha group includes two active and potentially dangerous volcanoes, Avachinsky and Koryaksky, located close to Petropavlovsk-Kamchatsky, the main city of Kamchatka. We present the results of two independent seismic studies of shallow crustal structures beneath the Avacha gro...
Published in: | Journal of Volcanology and Geothermal Research |
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-03581097 https://doi.org/10.1016/j.jvolgeores.2014.08.012 |
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ftunivparis:oai:HAL:insu-03581097v1 2023-05-15T16:58:48+02:00 Asymmetric caldera-related structures in the area of the Avacha group of volcanoes in Kamchatka as revealed by ambient noise tomography and deep seismic sounding Koulakov, Ivan Jaxybulatov, Kayrly Shapiro, Nikolay M. Abkadyrov, Ilyas Deev, Evgeny Jakovlev, Andrey Kuznetsov, Pavel Gordeev, Evgeny Chebrov, Viktor 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) 2014 https://hal-insu.archives-ouvertes.fr/insu-03581097 https://doi.org/10.1016/j.jvolgeores.2014.08.012 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jvolgeores.2014.08.012 insu-03581097 https://hal-insu.archives-ouvertes.fr/insu-03581097 BIBCODE: 2014JVGR.285.36K doi:10.1016/j.jvolgeores.2014.08.012 Journal of Volcanology and Geothermal Research https://hal-insu.archives-ouvertes.fr/insu-03581097 Journal of Volcanology and Geothermal Research, 2014, 285, pp.36-46. ⟨10.1016/j.jvolgeores.2014.08.012⟩ Kamchatka Avachinsky volcano Ambient noise tomography Deep seismic sounding Caldera forming [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2014 ftunivparis https://doi.org/10.1016/j.jvolgeores.2014.08.012 2023-03-15T17:42:53Z International audience Avacha group includes two active and potentially dangerous volcanoes, Avachinsky and Koryaksky, located close to Petropavlovsk-Kamchatsky, the main city of Kamchatka. We present the results of two independent seismic studies of shallow crustal structures beneath the Avacha group based on passive and active source observations. The first study is based on the analysis of continuous recording by 11 seismic stations installed over the Avacha group in 2012 and 7 permanent stations in the same region. We present a series of 2D Rayleigh-wave group velocity maps based on correlation of ambient noise, that were then converted into 3D distribution of shear wave velocity. The second work was based on the reprocessing of an active source deep seismic sounding profile across the Avachinsky volcano that was shot in 1982-1984. We made the analysis of travel times of refracted waves using a 2D tomography inversion. The resulting seismic models appear to be consistent with each other and show clear low-velocity zone to the SW of the Avachinsky volcano and high velocity structures to NE. These observations also agree with the existing gravity and magnetotelluric measurements. Based on the obtained seismic models we identify two large buried calderas and large lava flows that are thought to be related to a series of large eruption episodes of Avachinsky occurred within the last 30,000 years. Article in Journal/Newspaper Kamchatka Université de Paris: Portail HAL Petropavlovsk ENVELOPE(158.626,158.626,53.067,53.067) Avacha ENVELOPE(158.503,158.503,53.040,53.040) Petropavlovsk-Kamchatsky ENVELOPE(158.651,158.651,53.044,53.044) Journal of Volcanology and Geothermal Research 285 36 46 |
institution |
Open Polar |
collection |
Université de Paris: Portail HAL |
op_collection_id |
ftunivparis |
language |
English |
topic |
Kamchatka Avachinsky volcano Ambient noise tomography Deep seismic sounding Caldera forming [SDU]Sciences of the Universe [physics] |
spellingShingle |
Kamchatka Avachinsky volcano Ambient noise tomography Deep seismic sounding Caldera forming [SDU]Sciences of the Universe [physics] Koulakov, Ivan Jaxybulatov, Kayrly Shapiro, Nikolay M. Abkadyrov, Ilyas Deev, Evgeny Jakovlev, Andrey Kuznetsov, Pavel Gordeev, Evgeny Chebrov, Viktor Asymmetric caldera-related structures in the area of the Avacha group of volcanoes in Kamchatka as revealed by ambient noise tomography and deep seismic sounding |
topic_facet |
Kamchatka Avachinsky volcano Ambient noise tomography Deep seismic sounding Caldera forming [SDU]Sciences of the Universe [physics] |
description |
International audience Avacha group includes two active and potentially dangerous volcanoes, Avachinsky and Koryaksky, located close to Petropavlovsk-Kamchatsky, the main city of Kamchatka. We present the results of two independent seismic studies of shallow crustal structures beneath the Avacha group based on passive and active source observations. The first study is based on the analysis of continuous recording by 11 seismic stations installed over the Avacha group in 2012 and 7 permanent stations in the same region. We present a series of 2D Rayleigh-wave group velocity maps based on correlation of ambient noise, that were then converted into 3D distribution of shear wave velocity. The second work was based on the reprocessing of an active source deep seismic sounding profile across the Avachinsky volcano that was shot in 1982-1984. We made the analysis of travel times of refracted waves using a 2D tomography inversion. The resulting seismic models appear to be consistent with each other and show clear low-velocity zone to the SW of the Avachinsky volcano and high velocity structures to NE. These observations also agree with the existing gravity and magnetotelluric measurements. Based on the obtained seismic models we identify two large buried calderas and large lava flows that are thought to be related to a series of large eruption episodes of Avachinsky occurred within the last 30,000 years. |
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 |
Koulakov, Ivan Jaxybulatov, Kayrly Shapiro, Nikolay M. Abkadyrov, Ilyas Deev, Evgeny Jakovlev, Andrey Kuznetsov, Pavel Gordeev, Evgeny Chebrov, Viktor |
author_facet |
Koulakov, Ivan Jaxybulatov, Kayrly Shapiro, Nikolay M. Abkadyrov, Ilyas Deev, Evgeny Jakovlev, Andrey Kuznetsov, Pavel Gordeev, Evgeny Chebrov, Viktor |
author_sort |
Koulakov, Ivan |
title |
Asymmetric caldera-related structures in the area of the Avacha group of volcanoes in Kamchatka as revealed by ambient noise tomography and deep seismic sounding |
title_short |
Asymmetric caldera-related structures in the area of the Avacha group of volcanoes in Kamchatka as revealed by ambient noise tomography and deep seismic sounding |
title_full |
Asymmetric caldera-related structures in the area of the Avacha group of volcanoes in Kamchatka as revealed by ambient noise tomography and deep seismic sounding |
title_fullStr |
Asymmetric caldera-related structures in the area of the Avacha group of volcanoes in Kamchatka as revealed by ambient noise tomography and deep seismic sounding |
title_full_unstemmed |
Asymmetric caldera-related structures in the area of the Avacha group of volcanoes in Kamchatka as revealed by ambient noise tomography and deep seismic sounding |
title_sort |
asymmetric caldera-related structures in the area of the avacha group of volcanoes in kamchatka as revealed by ambient noise tomography and deep seismic sounding |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03581097 https://doi.org/10.1016/j.jvolgeores.2014.08.012 |
long_lat |
ENVELOPE(158.626,158.626,53.067,53.067) ENVELOPE(158.503,158.503,53.040,53.040) ENVELOPE(158.651,158.651,53.044,53.044) |
geographic |
Petropavlovsk Avacha Petropavlovsk-Kamchatsky |
geographic_facet |
Petropavlovsk Avacha Petropavlovsk-Kamchatsky |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Journal of Volcanology and Geothermal Research https://hal-insu.archives-ouvertes.fr/insu-03581097 Journal of Volcanology and Geothermal Research, 2014, 285, pp.36-46. ⟨10.1016/j.jvolgeores.2014.08.012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jvolgeores.2014.08.012 insu-03581097 https://hal-insu.archives-ouvertes.fr/insu-03581097 BIBCODE: 2014JVGR.285.36K doi:10.1016/j.jvolgeores.2014.08.012 |
op_doi |
https://doi.org/10.1016/j.jvolgeores.2014.08.012 |
container_title |
Journal of Volcanology and Geothermal Research |
container_volume |
285 |
container_start_page |
36 |
op_container_end_page |
46 |
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1766050903270359040 |