Disaster Management Bureau         Bangladesh is mainly alluvial deltaic plain divided into three zones, namely hills, terraces and flood plain based on geomorphology and physiography. The country has an approximate area of 147,570 sq.km.bounded between 20º34´ to 26º38´ N latitude and 88º01´ to 92º 41´ E longitude and has 4,685 km. long boundary unique geographical location in South Asia forming lower part of the basins of three mighty rivers , the Padma (Known as the Ganges in India), the Brahmaputra and the Meghna. Bangladesh with its fragile state of economy depends predominantly on agriculture which has strong linkage with seasonal weather systems. The land is frequently visited by natural hazards of which floods, cyclones with accompanying stormsurges, droughts , tornadoes, river-bank erosions and earthquake are the most disastrous to mention. Bangladesh, which is also in close proximity with the Himalayas , have a long history of secismic tremors. Four great earthquakes of magnitude exceeding