Geohazards: Prevention, risk reduction, early warning and preparedness
This symposium is a general thematic one that involves local, regional and global results and ideas of recent studies on any geohazardous phenomena, the role, mechanism and recurrence time of natural and manmade events, and the effective ideas of reduction of deaths, material and infrastructure loss. Hazard is defined as risk of disaster. Most of the geohazards include various phenomena that occurred on the surface of the earth responsible for the loss of anything related to human presence and activities. All of these are related more or less to the concepts of geological phenomena but not too much attention has been paid to the disasters from geological viewpoints. This means that we need more attention and preparedness through research and education to the people, decision or policy makers and particularly citizens including students and pupils. The geohazards range from volcanic and seismic activities, to storms, floods and high tides related to climatic phenomena (such as sea level change), landslides including both on land and submarine ones, tsunamis, and sink hole collapses. They also include liquefaction and fluidization induced by earthquake shaking. Those phenomena range so wide that we need focus on these geological processes, and not to focus solely on climatologic influences.
Yujiro Ogawa, Nalin Ratnayake, Yildirim Dilek, Kazuhisa Goto and Yasukuni Okubo