Based on the data of cross—fault survey in the study area, the annual rates of vertical fault motions in related fault zones were calculated and the behaviours of fault motions were analyzed.

Research purposes: Jiaozhou Bay Tunnel is needed to cross the seabed fault zone, but a little survey geological data are obtained because of the means limitation of engineering survey.

Based on the principle of minimum cross-entropy, diagnostic entropy in broad sense is applied to characterize the fault diagnostic process.