图上Ⅰ、Ⅱ为两条相交的地震测线,根据在剖面上反映的断面视倾角可以求出其真倾角来,方法如下。先说明图上的符号:G:地表面;R:断层面;Ⅰ、Ⅱ:两条地震测线;θ:两条测线的夹角; :断面的真倾角;φ_1、φ_2:测线Ⅰ、Ⅱ剖面上的断面视倾角。作图步骤:1、过两条测线交点 O 向 R 作垂线,交 R 于 D 点。2、过 D 作 G 的垂线,交 G 于 B 点。 Ⅰ, Ⅱ on the map for the two intersecting seismic line, according to the cross-section reflected in the cross-section of the apparent dip angle can be obtained, as follows. First, the symbols in the figure are described: G: ground surface; R: fault plane; Ⅰ, Ⅱ: two seismic lines; θ: angle between two lines; true dip angle of section; φ_1, φ_2: , Ⅱ section of the cross-sectional view of the dip. Mapping steps: 1, over two lines intersect O to R for vertical, cross R at D point. 2, D for G’s vertical line, pay G at B point.