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Bulletin of the Seismological Society of America; October 1975; v. 65; no. 5; p. 1051-1057
© 1975 Seismological Society of America
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Short-period Rayleigh-wave dispersion across the Tibetan Plateau

W. P. CHEN and P. MOLNAR

DEPARTMENT OF EARTH AND PLANETARY SCIENCES MASSACHUSETTS INSTITUTE OF TECHNOLOGY, CAMBRIDGE, MASSACHUSETTS 02139

Abstract

Well-dispersed Rayleigh waves within the period range of 4 to 11 sec are observed at New Delhi (NDI) and Shillong (SHL), India, for seven earthquakes near and in the Tibetan Plateau from 1963 to 1971. The dispersion curves and the simply dispersed wave forms suggest a prominent overlying wave guide, probably sediments, in the Tibetan area. The thickness of such sediments is most likely between 2.5 and 7.0 km. The simple wave trains, without much distortion due to multipathing, are consistent with a relatively inert, recent tectonism in Tibet.




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K.-Y. CHUN and T. YOSHII
Crustal structure of the Tibetan Plateau: A surface-wave study by a moving window analysis
Bulletin of the Seismological Society of America, June 1, 1977; 67(3): 735 - 750.
[Abstract] [PDF]




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