magnitude portion
1.Based upon the analysis of regional geotectonic background of the Tianshui area, in this paper it is emphatically pointed out that Lojiapo earthquake of magnitude 71/2 in 1654 occurred at the most deep depression of Tian—Li basin since Kainozoic Era, where the conjunction portion was formed as a result of the interaction of the structure in NE trend with active structure in NNW trend.
