Some statistic characteristics of “Underground Hot vortex” in China during 1980–1993 (I) |
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Authors: | Maocang Tang Xiaoqing Gao |
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Institution: | (1) Lanzhou lnstitute of Plateau Atmospheric Physics, 730000 Lanzhou, China |
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Abstract: | Using ground temperature data from meteorological stations as well as earthquake, ground tilt and precipitation data, the
spatial-temporal distribution of “Underground Hot Vortex” (UHV) in China was analyzed in detail. The results show that concerning
an “Underground Hot Vortex” cell, its life-span is 3–8 seasons, 1.5 years on average; the mean horizontal scale is 600 km
and its characteristic velocity is about 400 km/a; UHV is likely to appear in some areas where the crustal movement is intense
and the absolute value of vertical deformation rate is relatively high; its activity could hardly be detected in the area
where the crust is stable and the vertical deformation is weak; most of “Underground Hot Vortex Groups” originate from the
edge of Indian Plate, then migrate eastwards with a leaping-frog style. 5–10 years are needed for their arrival in the eastern
border of China. Their horizontal migrating velocity is 200–500 km/a which is nearly equal to the characteristic velocity
of a single UHV.
Project sponsored by the National Climbing Project and Key Project of the Chinese Academy of Sciences. |
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Keywords: | Underground Hot Vortex spatial-temporal distribution crustal deformation China |
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