As shown in Table . 2-1, many definitions have been developed to try to grasp the essential characteristics of the interrelations between the observed hazards. However, precise and inclusive definitions are scarce , and the spatiotemporal evolution characteristics of multi-hazard coupling scenarios are ignored. To develop an interdisciplinary integration of fragmented literature, a delimitation criterion for multihazard coupling scenarios is required. Several natural hazards occur simultaneously in a specific region.