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自由振荡与 地球及类地天体内部大尺度非均匀结构研究

http://seminar.kl-edi.ac.cn. 欢迎参加 第 47 次地球深部学术沙龙 !. 自由振荡与 地球及类地天体内部大尺度非均匀结构研究. 李小凡 研究员. 2013-09-27. 地球:“巨无霸钟”. …… 陶然亭的芦花,钓鱼台的柳影,西山的虫唱, 玉泉的夜月, 潭柘寺的钟声 …… —— 故都的秋,郁达夫. 自由振荡的每一个本征频率对应一种 驻波 (standing wave). 振荡的类型. 球型振荡( Spheroidal mode )

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自由振荡与 地球及类地天体内部大尺度非均匀结构研究

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  1. http://seminar.kl-edi.ac.cn 欢迎参加第47次地球深部学术沙龙! 自由振荡与地球及类地天体内部大尺度非均匀结构研究 李小凡 研究员 2013-09-27

  2. 地球:“巨无霸钟” …… 陶然亭的芦花,钓鱼台的柳影,西山的虫唱, 玉泉的夜月,潭柘寺的钟声…… ——故都的秋,郁达夫

  3. 自由振荡的每一个本征频率对应一种驻波(standing wave)

  4. 振荡的类型 • 球型振荡(Spheroidal mode) Motions are parallel to the radial direction. Sensitive to gravity, or density. nSl • 环型振荡(Toroidal mode)质点只在同心球面上运动,位移无径向分量nTl

  5. 0S2 Period = 54 min 0S1 Period = 41 min 0S3 Period = 36 min 0T1 Period = 13 min 0T2 Period = 44 min 0T3 Period = 28 min http://icb.u-bourgogne.fr/nano/manapi/saviot/terre/index.en.html

  6. Spheroidal oscillation 6S4 Spheroidal mode: 30S12 Courtesy of Harvard Seismology

  7. 2011,Tohoku 地震后记录到的自由振荡信号 0S5 0S9 0S3 0S4 PAB台(位于西班牙)记录信号 MAKZ台(Kazakhstan)记录到的信号 地球结构的约束,如PREM(1000多个 normal mode周期) 对震源的约束

  8. http://seminar.kl-edi.ac.cn 欢迎参加第47次地球深部学术沙龙! 自由振荡与地球及类地天体内部大尺度非均匀结构研究 李小凡 研究员

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