Combined approach to estimate the depth of the magma surface in a shallow conduit at Aso volcano, Japan
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- Material Type
- 記事
- Author/Editor
- Kyoka IshiiAkihiko Yokoo
- Publication, Distribution, etc.
- Publication Date
- 2021-10-18
- Publication Date (W3CDTF)
- 2021-10-18
- Periodical title
- EPS : Earth, Planets and Space
- No. or year of volume/issue
- 73(187)
- Volume
- 73(187)
- ISSN (Periodical Title)
- 1880-5981
- ISSN-L (Periodical Title)
- 1343-8832
- Text Language Code
- eng
- DOI
- 10.1186/s40623-021-01523-z
- Persistent ID (NDL)
- info:ndljp/pid/12287019
- Collection
- Collection (Materials For Handicapped People:1)
- Collection (particular)
- 国立国会図書館デジタルコレクション > 電子書籍・電子雑誌 > その他
- Acquisition Basis
- オンライン資料収集制度
- Date Accepted (W3CDTF)
- 2022-05-18T20:14:28+09:00
- Date Captured (W3CDTF)
- 2022-04-27
- Format (IMT)
- application/pdf
- Access Restrictions
- 国立国会図書館内限定公開
- Service for the Digitized Contents Transmission Service
- 図書館・個人送信対象外
- Availability of remote photoduplication service
- 可
- Periodical Title (URI)
- Periodical Title (Persistent ID (NDL))
- info:ndljp/pid/11667897
- Data Provider (Database)
- 国立国会図書館 : 国立国会図書館デジタルコレクション
- Summary, etc.
- Open-vent volcanoes provide opportunities to perform various methods of observation that can be used to study shallow plumbing systems. The depth of the magma–air interface in the shallow portion of the conduit can be used as an indicator of the volcanic activity of open-vent volcanoes. Although there are many methods used to estimate the depth, most of them cannot constrain the depth to a narrow range due to other unknown parameters. To constrain the depth more accurately, we combine two methods commonly used for estimating the depth of the magma–air interface. They consider the acoustic resonant frequency and the time delay of arrivals between the seismic and infrasound signals of explosions. Both methods have the same unknown parameters: the depth of the magma–air interface and the sound velocity inside the vent. Therefore, these unknowns are constrained so that both the observed resonant frequency and time delay can be explained simultaneously. We use seismo-acoustic data of Strombolian explosions recorded in the vicinity of Aso volcano, Japan, in 2015. The estimated depths and the sound velocities are 40–200 m and 300–680 m/s, respectively. The depth range is narrower than that of a previous study using only the time delay of arrivals. However, only a small amount of the observed data can be used for the estimation, as the rest of the data cannot provide realistic depths or sound velocities. In particular, a wide distribution of the observed time delay data cannot be explained by our simple assumptions. By considering a more complicated environment of explosions, such as source positions of explosions distributed across the whole surface of a lava pond in the conduit, most of the observed data can be used for estimation. This suggests that the factor controlling the observed time delay is not as simple as generally expected.
- DOI
- 10.1186/s40623-021-01523-z
- Access Restrictions
- インターネット公開
- Rights (production)
- © The Author(s) 2021.This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
- Related Material
- Additional file 1 of Combined approach to estimate the depth of the magma surface in a shallow conduit at Aso volcano, JapanAdditional file 2 of Combined approach to estimate the depth of the magma surface in a shallow conduit at Aso volcano, JapanAdditional file 3 of Combined approach to estimate the depth of the magma surface in a shallow conduit at Aso volcano, Japan
- Related Material (URI)
- Is Referenced By
- Vulcanian eruptions at Sakurajima Volcano: geophysical data, numerical modelling, and petrological evidenceTemporal variation in the depth of the magma surface at Aso volcano in 2014–2015A novel high accuracy finite-difference time-domain methodHeat transport process associated with the 2021 eruption of Aso volcano revealed by thermal and gas monitoringEvaluation of topographic effects on infrasonic array observation toward the source elevation estimation
- References
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