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1944年東南海地震（M7.9）の震度分布 : 発生直後に行われたアンケート調査資料の再検討
https://doi.org/10.15083/0000048915
https://doi.org/10.15083/000004891546959d0d-05fb-43b5-b322-43bed5b07502
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
IHO92101.pdf (16.6MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-12-05 | |||||
| タイトル | ||||||
| タイトル | 1944年東南海地震（M7.9）の震度分布 : 発生直後に行われたアンケート調査資料の再検討 | |||||
| 言語 | ja | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | 1944 Tonankai earthquake | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Seismic intensity | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Questionnaire survey | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Kawasumi's intensity scale | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Old and new JMA's intensity scales | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | departmental bulletin paper | |||||
| ID登録 | ||||||
| ID登録 | 10.15083/0000048915 | |||||
| ID登録タイプ | JaLC | |||||
| その他のタイトル | ||||||
| その他のタイトル | Seismic Intensities of the 1944 Tonankai Earthquake (M7.9) : Re-examination of the Original Documents of the Questionnaire Survey Conducted just after the Earthquake | |||||
| 著者 |
原田, 智也
× 原田, 智也× 佐竹, 健治× 古村, 孝志× 室谷, 智子 |
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| 著者所属 | ||||||
| 著者所属 | 東京大学地震研究所 | |||||
| 著者所属 | ||||||
| 著者所属 | 国立科学博物館 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We estimated the seismic intensity distribution of the 1944 Tonankai earthquake (M7.9) based on an examination of the original sheets of a questionnaire survey conducted by the Earthquake Research Institute (ERI) of the University of Tokyo. ERI conducted questionnaire surveys for significant earthquakes from 1943 to 1988. In these surveys, the 12-class seismic intensity scale (Ik), which is similar to the Modified Mercalli intensity scale (MMI-scale), was used. Survey results for earthquakes after 1950 were investigated and published, but the survey results for earthquakes in the 1940s have not been published and the original sheets of the surveys were considered to be missing. In addition to 199 original questionnaires and summary sheets discovered in recent years, we discovered an additional 91 original sheets. In this study, we examine the 289 original questionnaire sheets, excluding one without location information. Because multiple intensity values are obtained for various kinds of damage and detailed human behaviors at each survey point, representative values of seismic intensities at a point are necessary to make a seismic intensity distribution map. In previous studies, the mean value of seismic intensities was used as a representative value, but the mean value saturates at Ik 8-9 (corresponding to V on old JMA's intensity scale) because of a larger reported number of lower intensities. The mean of the top five seismic intensity reports hardly saturates and its distribution is similar to that reported by the Central Meteorological Observatory (CMO), as well as the distribution of slight house damage. While the number of newly estimated seismic intensities is less than 60% of the CMO's seismic intensities, the new seismic intensity distribution map clarifies some characteristics of 1944 seismic ground motions. (1) High intensities (Ik 6-9) are estimated not only in the northeastern region of Biwa Lake in Shiga Prefecture, but also in the entire prefecture around the lake. (2) High intensities (Ik 6-7) are estimated in the Ina Valley in Nagano Prefecture where two previous Tokai earthquakes also caused damage. (3) Seismic ground motions are strongly amplified (Ik 7-8) in the Fukui Plain, which is more than 200km from the 1944 source. (4) Seismic intensities along the Pacific coast of Tokushima Prefecture are high (Ik 6-7). (5) Significantly higher seismic intensities (Ik 8) are estimated in the eastern part of Saitama Prefecture than those in the surrounding region. In this region, other earthquakes such as the 1854 Ansei Tokai earthquake (M8.4) and the 1923 Kanto earthquakes (M7.9) also caused abnormally high seismic intensities, while the cause of such high intensities has not been clarified yet. | |||||
| 書誌情報 |
地震研究所彙報 = Bulletin of the Earthquake Research Institute 巻 92, 号 1, p. 1-30, 発行日 2017 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 00408972 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00162258 | |||||
| 著者版フラグ | ||||||
| 値 | publisher | |||||
| 出版者 | ||||||
| 出版者 | 東京大学地震研究所 | |||||
| 出版者別名 | ||||||
| Earthquake Research Institute, University of Tokyo | ||||||
