The Yecheng, Xinjiang, China, earthquake of February 14, 1980 —A destructive intermediate earthquake |
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Authors: | Suyun Wang Zhenliang Shi and Wenlin Huan |
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Institution: | (1) Institute of Geophysics, State Seismological Bureau, 100081 Beijing, China |
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Abstract: | In this study, we have checked the location and focal depth of the Yecheng earthquake (m
b
= 6.0, maximum intensity VII) of February 14, 1980. The result shows that this is an intermediate event with a focal depth
of 90 km. The microepicenter is located at 36. 4°N, 76, 9°E, while the macroepicenter is at 37.3°N, 76.9°E, 90 km to the north
of the microepicenter. This is the first destructive intermediate event in China which led to a damage as severe as of intensity
VII. The focal mechanism of the event is determined to be of thrust type. Combined with the analysis of seismological and
geological data in surrounding area, the possible relation between the event and plate movement has been discussed. The result
in this paper indicates that in some particular place, the destructive effect of intermediate event should be considered in
seismic hazard assessment.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,14, 137–143, 1992. |
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Keywords: | intermediate earthquake focal depth epicentral intensity focal mechanism |
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