| タイトル | A surface-wave investigation of the rupture mechanism of the Gobi-Altai (4 December 1957) earthquake |
| 本文（外部サイト） | http://hdl.handle.net/2060/19760012553 |
| 著者（英） | Okal, E. A. |
| 著者所属（英） | California Inst. of Tech. |
| 発行日 | 1975-01-01 |
| 言語 | eng |
| 内容記述 | Long period records of multiple Love waves from the 1957 earthquake in Mongolia at Pasadena are analyzed and compared to synthetic seismograms, generated by the method of Kanamori. A fit in the time domain shows that the records are not consistent with the previous solution, achieved through a frequency domain analysis of directivity. The solution asks for a shorter rupture of 270 km at a velocity of 3.5 km/s. The focal parameters are constrained by updating all the reported first motion and are found to be: Strike = 103 deg, Dip = 53 deg, Slip = 32 deg. A seismic moment of 1.8 10 to the 28th power dynes-cm is obtained. These figures are also consistent with a time domain analysis of Love waves at Palisades and Strasbourg, and of Rayleigh waves at Pasadena, with a directivity study of Love waves at Pasadena, and with static deformation and isoseismal data. A discussion is given of the relation between moment, magnitude and rupture area, and a comparison is made with other events in the same region: It is concluded that this earthquake does not exhibit an intra-plate behavior, but rather compares better with inter-plate events, such as the great Assam earthquake. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 76N19641
NASA-CR-146509 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/186652 |
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