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Mechanism of the Hindu Kush Earthquake of Jan. 28, 1964, Derived from S Wave Data : The Use of pP-Phase for the Focal Mechanism Determination
https://doi.org/10.15083/0000033525
https://doi.org/10.15083/0000033525fd4d7877-f3a9-4c60-baf5-7e6f90174369
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ji0444002.pdf (866.7 kB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-05-30 | |||||
| タイトル | ||||||
| タイトル | Mechanism of the Hindu Kush Earthquake of Jan. 28, 1964, Derived from S Wave Data : The Use of pP-Phase for the Focal Mechanism Determination | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 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 | 10.15083/0000033525 | |||||
| ID登録タイプ | JaLC | |||||
| その他のタイトル | ||||||
| その他のタイトル | S波によるHindu Rush地震(1964年1月28日)のメカニズム : pP波の利用について | |||||
| 著者 |
Hirasawa, Tomowo
× Hirasawa, Tomowo |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 130964 | |||||
| 姓名 | Hedayati, A. | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 130965 | |||||
| 姓名 | 平沢, 朋郎 | |||||
| 著者所属 | ||||||
| 著者所属 | International Institute of Seismology and Earthquake Engineering | |||||
| 著者所属 | ||||||
| 著者所属 | Geophysical Institute, Faculty of Science, The University of Tokyo. | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The focal mechanism of the Hindu Kush earthquake of January 28, 1964 (focal depth; 207km, magnitude; 6.1, after USCGS) is discussed by using body waves. On the basis of the experimental as well as theoretical result on the phase shift of the reflected waves in the case of two-dimensional model simulating the earth by Shimamura and Sato (1965), attention is given to the use of the reflected phases for the focal mechanism study in this paper. The most probable solutions of the mechanism are numerically determined by using both the real polarization angles (ε) and the apparent polarization angles (γ), respectively, where the angle (γ) is obtained from the horizontal surface motion. The difference of the two solutions is found to be much less than the standard deviation of the solution. It is concluded that the earthquake can be explained by the double couple hypothesis since the observations of P and pP waves are sufficiently satisfied by the most probable solution determined from the S wave data alone by assuming the hypothesis. It is suggested that the use of the pP wave is serviceable to the focal mechanism determination except in the case of shallow earthquakes, while the use of the PP wave is undesirable because of its (-π/2)-phase shift. | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 1964年1月28日に起つたHindu Kush地震(深さ207km,マグニチュード6.1)のメカニズムを実体波の観測により調べた.主な結果は次の通りである. | |||||
| 書誌情報 |
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo 巻 44, 号 4, p. 1419-1434, 発行日 1967-03-31 |
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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 | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 日本十進分類法 | ||||||
| 主題Scheme | NDC | |||||
| 主題 | 453 | |||||
| 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 | ||||||
