Difference of horizontal-to-vertical spectral ratios of observed earthquakes and microtremors and its application to S-wave velocity inversion based on the diffuse field concept
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DOI[10.1186/s40623-017-0766-4]のデータに遷移します
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- 資料種別
- 記事
- 著者・編者
- Hiroshi KawaseYuta MoriFumiaki Nagashima
- 出版年月日等
- 2018-01-02
- 出版年（W3CDTF）
- 2018-01-02
- タイトル（掲載誌）
- EPS : Earth, Planets and Space
- 巻号年月日等（掲載誌）
- 70(1)
- 掲載巻
- 70(1)
- ISSN（掲載誌）
- 1880-5981
- ISSN-L（掲載誌）
- 1343-8832
- 本文の言語コード
- eng
- DOI
- 10.1186/s40623-017-0766-4
- 国立国会図書館永続的識別子
- info:ndljp/pid/11067457
- コレクション（共通）
- コレクション（障害者向け資料：レベル1）
- コレクション（個別）
- 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
- 収集根拠
- オンライン資料収集制度
- 受理日（W3CDTF）
- 2018-04-12T16:47:48+09:00
- 保存日（W3CDTF）
- 2018-04-12
- 記録形式（IMT）
- application/pdf
- オンライン閲覧公開範囲
- 国立国会図書館内限定公開
- デジタル化資料送信
- 図書館・個人送信対象外
- 遠隔複写可否（NDL）
- 可
- 掲載誌（国立国会図書館永続的識別子）
- info:ndljp/pid/11067456
- 連携機関・データベース
- 国立国会図書館 : 国立国会図書館デジタルコレクション
- 要約等
- We have been discussing the validity of using the horizontal-to-vertical spectral ratios (HVRs) as a substitute for S-wave amplifications after Nakamura first proposed the idea in 1989. So far a formula for HVRs had not been derived that fully utilized their physical characteristics until a recent proposal based on the diffuse field concept. There is another source of confusion that comes from the mixed use of HVRs from earthquake and microtremors, although their wave fields are hardly the same. In this study, we compared HVRs from observed microtremors (MHVR) and those from observed earthquake motions (EHVR) at one hundred K-NET and KiK-net stations. We found that MHVR and EHVR share similarities, especially until their first peak frequency, but have significant differences in the higher frequency range. This is because microtremors mainly consist of surface waves so that peaks associated with higher modes would not be prominent, while seismic motions mainly consist of upwardly propagating plain body waves so that higher mode resonances can be seen in high frequency. We defined here the spectral amplitude ratio between them as EMR and calculated their average. We categorize all the sites into five bins by their fundamental peak frequencies in MHVR. Once we obtained EMRs for five categories, we back-calculated EHVRs from MHVRs, which we call pseudo-EHVRs (pEHVR). We found that pEHVR is much closer to EHVR than MHVR. Then we use our inversion code to invert the one-dimensional S-wave velocity structures from EHVRs based on the diffuse field concept. We also applied the same code to pEHVRs and MHVRs for comparison. We found that pEHVRs yield velocity structures much closer to those by EHVRs than those by MHVRs. This is natural since what we have done up to here is circular except for the average operation in EMRs. Finally, we showed independent examples of data not used in the EMR calculation, where better ground structures were successfully identified from pEHVRs again. Thus we proposed here a simple empirical method to estimate S-wave velocity structures using single-station microtremor records, which is the most cost-effective method to characterize the site effects.
- DOI
- 10.1186/s40623-017-0766-4
- オンライン閲覧公開範囲
- インターネット公開
- 著作権情報
- © The Author(s) 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
- 関連情報（URI）
- 参照
- Site Effects Analysis of Shallow Subsurface Structures at Mashiki Town, Kumamoto, Based on Microtremor Horizontal-to-Vertical Spectral RatiosHigh-frequency S and S-coda waves at ocean-bottom seismometersEffects of solar flares and coronal mass ejections on Earth’s horizontal magnetic field and solar wind parameters during the minimum solar cycle 24Estimation of site response during the 2016 Chauk, Myanmar earthquake based on microtremor-derived S-wave velocity structuresDeep‐neural‐network model for predicting ground motion parameters using earthquake horizontal‐to‐vertical spectral ratiosTransfer learning model for estimating site amplification factors from limited microtremor H/V spectral ratiosPhysics-informed deep learning quantifies propagated uncertainty in seismic structure and hypocenter determinationEvaluation of site amplification factors at severely damaged sites during the 1923 Kanto Earthquake by using the EMR and VACF methodsEmpirical approach for the duration effects in the lower frequency range on strong motions inside large sedimentary basins
- 参照
- The Effect of Lateral Heterogeneity on Horizontal-to-Vertical Spectral Ratio of Microtremors Inferred from Observation and SyntheticsApplication of Horizontal-to-Vertical Spectral Ratios of Earthquake Ground Motions to Identify Subsurface Structures at and around the K-NET Site in Tohoku, JapanSite characterization by seismic noise in Istanbul, TurkeyUsing Diffuse Field Theory to Interpret the H/V Spectral Ratio from Earthquake Records in Cibeles Seismic Station, Mexico CitySynthesis of a layered medium from its acoustic transmission responseStatistical Properties of Strong Ground Motions from the Generalized Spectral Inversion of Data Observed by K‐NET, KiK‐net, and the JMA Shindokei Network in JapanThe nature of noise wavefield and its applications for site effects studiesApplicability of Theoretical Horizontal-to-Vertical Ratio of Microtremors Based on the Diffuse Field Concept to Previously Observed DataObjective Determination of Source Parameters and Similarity of Earthquakes of Different SizeA computer code for forward calculation and inversion of the H/V spectral ratio under the diffuse field assumptionWhat is a reference site?Validation of a New Velocity Structure Inversion Method Based on Horizontal-to-Vertical (H/V) Spectral Ratios of Earthquake Motions in the Tohoku Area, JapanEstimation of S-Wave Velocity Structures in and around the Sendai Basin, Japan, Using Array Records of MicrotremorsEnergy partition of seismic coda waves in layered media: theory and application to Pinyon Flats ObservatoryLong-Range Correlations in the Diffuse Seismic CodaFull microtremor H/V(z, f) inversion for shallow subsurface characterizationSite characterization for urban seismic hazards in lower Manhattan, New York City, from microtremor array analysisAnelastic Earth structure from the coherency of the ambient seismic fieldThe Optimal Use of Horizontal-to-Vertical Spectral Ratios of Earthquake Motions for Velocity Inversions Based on Diffuse-Field Theory for Plane WavesBeyond the SPAC Method: Exploiting the Wealth of Circular-Array Methods for Microtremor ExplorationStatistical spectral model of earthquakes in the eastern Tohoku district, Japan, based on the surface and borehole records observed in SendaiKyoshin Net (K-NET)A theory for microtremor H/V spectral ratio: application for a layered mediumDifferences Between Site Characteristics Obtained From Microtremors, S-waves, P-waves, and CodasCenterless circular array method: Inferring phase velocities of Rayleigh waves in broad wavelength ranges using microtremor recordsThe Microtremor Survey MethodRecent progress of seismic observation networks in JapanHi-net and F-net and K-NET and KiK-netハイブリッドヒューリスティック探索による位相速度の逆解析Inversion of the phase velocity of long-period microtremors to the S-wave-velocity structure down to the basement in urbanized areas
- 連携機関・データベース
- 国立情報学研究所 : CiNii Research
- 提供元機関・データベース
- 学術機関リポジトリデータベース雑誌記事索引データベースCrossrefCiNii Articles科学研究費助成事業データベースCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossrefCrossref
- 書誌ID（NDLBibID）
- 11067457
- NII論文ID
- 120006545207