Title | S-wave modelling of the Showa-Shinzan lava dome in Usu Volcano, Northern Japan, from seismic observations |
Author | Takeo,Akiko1 ![]() ![]() ![]() |
Corresponding Author | Takeo,Akiko; Takeo,Akiko |
Publication Years | 2022-09-01
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DOI | |
Source Title | |
ISSN | 0956-540X
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EISSN | 1365-246X
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Volume | 230Issue:3Pages:1662-1678 |
Abstract | To obtain an internal S-wave velocity structure, we conducted a passive seismic campaign with 21 1-Hz seismometers on and around the Showa-Shinzan lava dome, which emerged during the 1943-1945 eruption of Usu Volcano, Japan. Before the campaign, we calibrated seismometers and found slight phase-response differences between seismometers of less than 1-2°. After the campaign, we extracted seismic wavefield by taking cross-correlations of vertical-component ambient noise records between seismic sites. We developed a new method to measure phase velocities of the Rayleigh wave automatically by assuming layered structure and finally obtained 1-D S-wave velocity models in summit, roof and base regions. The obtained S-wave velocity right beneath the intruded lava dome is higher than that in surrounding areas by a few tens of per cent down to a few hundred metres below sea level, indicating narrow but deep existence of the root of the lava dome. The obtained S-wave velocity at depths shallower than ∼50 m inside the lava dome in the summit area was ∼1 km s-1, significantly lower than that predicted from the density of 2.3 × 103 kg m-3 estimated in previous muon-radiography studies and a conventional scaling, indicating the effect of cracking in the lava dome. |
Keywords | |
URL | [Source Record] |
Indexed By | |
Language | English
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SUSTech Authorship | Others
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WOS Accession No | WOS:000797638800001
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EI Accession Number | 20222612273131
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EI Keywords | Acoustic Wave Velocity
; Domes
; Roofs
; Sea Level
; Seismology
; Shear Waves
; Surface Waves
; Volcanoes
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ESI Classification Code | Structural Members And Shapes:408.2
; Oceanography, General:471.1
; Seismology:484
; Earthquake Measurements And Analysis:484.1
; Acoustic Waves:751.1
; Mechanics:931.1
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ESI Research Field | GEOSCIENCES
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Scopus EID | 2-s2.0-85132791621
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Data Source | Scopus
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Citation statistics |
Cited Times [WOS]:2
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Document Type | Journal Article |
Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/352471 |
Department | Department of Earth and Space Sciences |
Affiliation | 1.Earthquake Research Institute,The University of Tokyo,Tokyo,1130032,Japan 2.Institute of Seismology and Volcanology,Faculty of Science,Hokkaido University,Hokkaido,0600810,Japan 3.Graduate School of Science and Technology,Hirosaki University,Aomori,0368561,Japan 4.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,518055,China 5.Tokyo Metropolitan Government Bureau of Construction,Tokyo,Japan 6.JX Nippon Oil & Gas Exploration Corp,Tokyo,Japan 7.Kobe University,Hyogo,Japan 8.Earthquake Research Institute,The University of Tokyo,Tokyo,1130032,Japan 9.Institute of Seismology and Volcanology,Faculty of Science,Hokkaido University,Hokkaido,0600810,Japan 10.Graduate School of Science and Technology,Hirosaki University,Aomori,0368561,Japan 11.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,518055,China 12.Tokyo Metropolitan Government Bureau of Construction,Tokyo,Japan 13.JX Nippon Oil & Gas Exploration Corp,Tokyo,Japan 14.Kobe University,Hyogo,Japan |
Recommended Citation GB/T 7714 |
Takeo,Akiko,Nishida,Kiwamu,Aoyama,Hiroshi,et al. S-wave modelling of the Showa-Shinzan lava dome in Usu Volcano, Northern Japan, from seismic observations[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2022,230(3):1662-1678.
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APA |
Takeo,Akiko.,Nishida,Kiwamu.,Aoyama,Hiroshi.,Ishise,Motoko.,Kai,Takeru.,...&Aoki,Yosuke.(2022).S-wave modelling of the Showa-Shinzan lava dome in Usu Volcano, Northern Japan, from seismic observations.GEOPHYSICAL JOURNAL INTERNATIONAL,230(3),1662-1678.
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MLA |
Takeo,Akiko,et al."S-wave modelling of the Showa-Shinzan lava dome in Usu Volcano, Northern Japan, from seismic observations".GEOPHYSICAL JOURNAL INTERNATIONAL 230.3(2022):1662-1678.
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