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By systematically studying seismic strengthening areas before 85 earthquakes with M≥6.0 in China some resultshave been extracted. ① Earthquake active strengthening area exists universally before strong shock or great earthquake; ② The size of the strengthening area and its appearing time will increase when the earthquake magnitudeincreases, ③ The rate between the size of seismic strengthening area and the size of the source region decreaseswhen earthquake magnitude increases; ④ The appearing time of the earthquake active strengthening region in theeastern par’t of China is longer than that in the western part of China. The above characteristics have been preliminarily explained qualitatively and half-quantitatively by applying the strong body earthquake generating model andthe hard inclusion theory. Then applying the seismic strengthening are, we have obtained long-term predictions of2 earthquakes, so the seismic strengthening area before strong earthquake or great earthquakes is a universal phenomenon, which has some mechanical base.
By systematically studying the strengthening of areas before 85 earthquakes with M ≥ 6.0 in China some resultshave been extracted. ① Earthquake active strengthening area exists universally before strong shock or great earthquake; ② The size of the strengthening area and its appearing time will increase when the earthquake magnitudeincreases, ③ The ratebetween the size of the seismic strengthening area and the size of the source region decreases the earthquake damping increases; ④ The appearing time of the earthquake active strengthening region in theeastern par’t of China is longer than that in the western part of China. The above characteristics have been preliminarily been qualitatively and half-quantitatively by applying the strong body earthquake generating model and the hard inclusion theory. Then applying the seismic strengthening are, we have gained long-term predictions of2 earthquakes, so the the seismic strengthening area strong earthquake or great earthquake s is a universal phenomenon, which has some mechanical base.