Vulnerability to Cyclone and Tsunamis

Cyclone and Tsunamis 

• With a coastline spanning 7,500 kms 5,700 km are at risk from cyclones and  tsunamis.
• Odisha, Andhra Pradesh, West Bengal, Tamil Nadu, Gujarat, Kerala, and Puducherry are states with high susceptibility.
• The Indian subcontinent is one of the worst affected regions in the world. The subcontinent, with a long coastline of 8041 kilometres is exposed to nearly 10 per cent of the world’s tropical cyclones.
• On the east coast of the Bay of Bengal and the west coast of the Arabian Sea, cyclones frequently occur.
• Bay of Bengal cyclones occur approximately four times more often than those occurring in the Arabian Sea. In India, a tropical cyclone forms five to six times a year, of which two or three are severe.

Tropical cyclones that inflict significant property and life loss are particularly dangerous for the Indian shores.   However, the Indian Meteorological Department has been  able to precisely follow these cyclones’ movements on each occasion and offer early warnings. 

Parameters that outline all potential tsunami sources and their occurrence rates are initially defined in a probabilistic tsunami hazard analysis (PTHA). Finally, metrics for tsunami propagation and inundation are modelled, typically using numerical simulations coupled with highly accurate bathymetry and topography.