I vote volcano...
Mt. Tambora, Indonesia
April 10 - 15, 1816
Death Toll: 92,000
The eruption of Tambora killed an estimated 92,000 people, including 10,000 from explosion and ash fall, and 82,000 from other causes.
The shockwave from the explosion was felt as far as a thousand miles away. Mt. Tambora, which was more than 13,000 feet tall before the explosion was reduced to 9,000 feet after ejecting more than 93 cubic miles of debris into the atmosphere.
This eruption had worldwide effects: 1816 became known as the “year without a summer” because of the volcanic ash in the atmosphere that lowered worldwide temperatures. It snowed in New England that June, and crop failures were common throughout Northern Europe and North America. As many as 100,000 additional deaths from starvation in these areas are thought to be traced to the eruption.
We also have to consider the physical location of a country. Some areas are more prone to large disasters and therefor the consequences will be more severe. Also countries in these hazard zones might be subjected to more frequent hazards. For instance the pacific ring of fire and Indonesia.
