Source parameters and site amplifcations estimated by generalized inversion technique : focusing on the 2018 Hokkaido Iburi-Tobu earthquake
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DOI[10.1186/s40623-019-1047-1]to the data of the same series
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- Material Type
- 記事
- Author/Editor
- Kenichi NakanoHiroshi Kawase
- Publication, Distribution, etc.
- Publication Date
- 2019-06-13
- Publication Date (W3CDTF)
- 2019-06-13
- Periodical title
- EPS : Earth, Planets and Space
- No. or year of volume/issue
- 71(66)
- Volume
- 71(66)
- ISSN (Periodical Title)
- 1880-5981
- ISSN-L (Periodical Title)
- 1343-8832
- Text Language Code
- eng
- DOI
- 10.1186/s40623-019-1047-1
- Persistent ID (NDL)
- info:ndljp/pid/11377491
- 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)
- 2019-10-28T20:45:15+09:00
- Date Captured (W3CDTF)
- 2019-10-28
- 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/11245705
- 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.
- The 2018 Hokkaido Iburi-Tobu earthquake occurred on September 6. In this earthquake, seismic intensity 7 was measured at Shikanuma, Atsuma Town, and severe damage occurred in Hokkaido. The strong motions were recorded at observation stations including those nearby the epicenter, and the seismograms at a few stations close to the epicenter showed pulse-like waveforms. In the region called Yufutsu Plain, the underground structure is quite complex because Yufutsu Plain is located at the western margin of the Hidaka collision zone. Thus, the mechanism of generating the observed high-amplitude ground motions in this area has not been clarified yet. We performed the generalized inversion technique to estimate the fundamental characteristics of source terms and site amplifications at Yufutsu area to investigate the mechanism mentioned above. We found that the stress drop of the mainshock of the 2018 Hokkaido Iburi-Tobu earthquake was approximately 10Mpa, which corresponds to the upper limit of the crustal earthquakes in the past, and that the short-period level A was approximately 1.17 × 1019 N·m. We also evaluated the site amplification at sites close to the aftershock zone. We found that the sites in the north with relatively high altitudes showed dominant frequencies above several Hz, while the sites in the south with relatively low altitudes showed dominant frequencies of approximately 1 Hz or lower. We also found that the site amplifications were quite large at three sites (BBC, HKD126 and IBUH03) where we observed clear pulse-like waveforms, and confirmed that they all showed dominant frequencies at approximately 1 Hz.
- DOI
- 10.1186/s40623-019-1047-1
- Access Restrictions
- インターネット公開
- Rights (production)
- © The Author(s) 2019. 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.
- Related Material (URI)
- Is Referenced By
- Strong-motion simulation for the 1944 Tonankai earthquake based on the statistical green’s function method and stochastic representation of complex source process強震記録や木造被害分布に基づく，M7クラスの内陸地殻内地震で震度7が発生しやすい場所の整理2018年北海道胆振東部地震の広帯域震源モデルの改良と水平・上下動の再現Three-dimensional S-wave attenuation structure in and around source area of the 2018 Hokkaido Eastern Iburi Earthquake, JapanSpecial issue “The 2018 Hokkaido Eastern Iburi Earthquake and Hidaka arc–arc collision system”
- Data Provider (Database)
- 国立情報学研究所 : CiNii Research
- Original Data Provider (Database)
- 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 ArticlesCrossrefCrossrefCrossrefCrossrefCrossref
- Bibliographic ID (NDL)
- 11377491
- NAID
- 120006879510