SOME STATISTIC CHARACTERISTICS OF UNDERGROUND HOT VORTEX IN CHINA DURING 1980-1993 .2. STATISTIC CORRELATION BETWEEN UNDERGROUND HOT VORTEXAND EARTHQUAKE

Based on the previous results, the relationship between ''Underground Hot Vortex'' (UHV) and earthquake was analyzed. Some results show that concerning a UHV with a larger horizontal scale or longer duration, t he accompanied earthquake will be surely stronger while no earthquake or only minor shocks appear with a weak UHV; the strong earthquakes du ring recent 14 years in China (M-s > 5.5 in East China, M-s > 6.5 in W est China) concentrated on two bells; i. e. within the scope of UHV ra dius ratio r/R = 0.32-0.61 and r/R = 0.73-0.79. No strong earthquake w as detected when r/R > 0.80; the horizontal angle oi the earthquake is to the north or northeast of WHV which lies in the central ascending region of crustal vertical deformation except for those in Guizhou Pro vince; the earthquake occurred to the southeast or west of UHV located in central descending region except for those in Fen-Wei River Valley ; the seismic magnitude is directly dependent on the lag rime between the appearance of UHV (the beginning time of T-3.2' greater than or eq ual to 0.5 degrees C) and the occurrence of earthquakes. A preliminary conception model indicating coupling between lithosphere and atmosphe re is pur forward on the basis of the previous analyses and this paper .