History of vulnerability of the state to the disasters of different types

The State is prone to disasters like earthquakes, floods, storms, etc. The State witnessed major earthquakes in 1941, 1947, 1950, and a number of subsequent earthquakes thereafter. Floods, Flashflood, Fire, Landslides, Mudslide, Erosions, Hailstones, Heavy Snowfall and High-Speed wind /thunderstorm damages are recurrent phenomena. The State has witnessed major floods and flash floods in the year 1961, 1994, 2001, 2004, 2008, 2014, and flood/ flash floods are now becoming a regular annual phenomenon.

The State of Arunachal Pradesh is in the high rainfall zones of the world where it receives 2500-3000mm average annually. The Floods and landslides in the state are largely due to the prevailing hydro-metrological, geomorphologic, and topographical features added by diminishing forest cover and it results in erosion of fertile agriculture/ horticulture fields.
Apart from this, the entire state is categorized under highly active seismic zone V. The state experiences tremors of minor magnitude every now and then, which results in loosening of soil and occurrence of gaps in the hilly slopes and triggers landslide during rains.

Major Earthquakes in Arunachal Pradesh