Because past surveys of Taiwan faults were mostly limited to examinations of surface geology, with no money to obtain more precise results by digging or drilling under the surface, major mistakes were common.
由於過去調查斷層多從地面岩層的連續性追蹤，缺乏地層開挖、鑽探等準確度調查，掌握到的斷層位置往往出現很大的誤差值。