The soil starting at the weakest layer will completely slide away over a very wide area, destroying everything located on the ground surface and causing much other damage. Slope Failure Slope failure occurs on steep slopes that have been weakened by extensive water penetration. The falling or crumbling that characterizes slope failure is usually triggered by rains or earthquakes. As slope failure tends to occur quickly, those dwelling nearby often do not have time to get away, giving rise to a very high mortality rate. Volcanic Disasters Volcanic eruptions are accompanied by a variety of associated phenomena which cause a number of related disasters.
Volcanoes are very powerful, extremely destructive, and cause extensive damage.
Various measures are being taken to enable establishment of a warning and evacuation system. These include creation of evacuation routes and emergency shelters, based on volcanic disaster simulation, and the use of monitoring cameras and sensors to provide early warning of volcanic activity. Protection against Shoreline Erosion Seawall, revetments, groins, and detached breakwaters are constructed to protect coastal areas against coastal erosion. The project aims at the comprehensive conservation and utilization of coastal areas. The improvement of a coastal community zone under the jurisdiction of the MLIT includes such projects as shore protection, public parks, roads, and sewers.