Physics
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pepi...18..309d&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 18, Issue 4, p. 309-318.
Physics
1
Scientific paper
On November 7, 1976, an earthquake of the strike-slip fault type, and of magnitude 6.7, occurred at two mountainous localities, Yanyuan and Ninglang, in the border region of the Szechuan and Yunnan Provinces, China. One year before the earthquake, a prediction was made as to the magnitude and location of the impending earthquake by the present authors, on the basis of the results of a general survey of an area of about 20,000 km2 for Vp/Vs ratio variations. The prediction of time of occurrence was made afterwards by the combined analysis of results of observations of some other precursory phenomena. The actual occurrence of the event was generally considered as being in agreement with the prediction. The present study may be taken as a new example for the detection of Vp/Vs ratio variations prior to an earthquake of the strike-slip fault type. By considering the difference between the shear rupture and stick-slip motion and the anisotropy induced by dilatancy, a preliminary discussion is made concerning the related results. All these names are spelled in Chinese phonetic alphabet as follows: Dong Songsheng, Ge Huanchen, Luo Ronglian, Xu Zhaoyong and Wagn Fengqi.
Dung Sung-Sheng
Ge Huan-Chen
Hsu Chao-Yong
Lo Yong-Lian
Wang Feng-Chi
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