Some statistic characteristics of “underground Hot vortex” in China during 1980–1993 (II)

Abstract

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, the accompanied earthquake will be surely stronger while no earthquake or only minor shocks appear with a weak UHV; the strong earthquakes during recent 14 years in China (M_s>5.5 in East China, M,>6. 5 in West China) concentrated on two belts; i.e. within the scope of UHV radius ratior/R =0.32–0.61 andr/R = 0.73–0.79. No strong earthquake was detected whenr/R>0.80; the horizontal angle of the earthquake is to the north or northeast of UHV which lies in the central ascending region of crustal vertical deformation except for those in Guizhou Province; 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 time between the appearance of UHV (the beginning time of T’_3.2⩾0.5°C) and the occurrence of earthquakes. A preliminary conception model indicating coupling between lithosphere and atmosphere is put forward on the basis of the previous analyses and this paper.