the tsunami and earthquake that happend in 2011 and also the nuclear reaction
The Blizzard of 1999.
Hurricane Hanna hit Haiti September of 2008. It has been the worst reported natural disaster
Earthquake....9.9er, Tsunami, and now nuclear leaks.
* floods * bushfires * volcanic eruptions
What Natural Disasters have happened in Ireland in the last 5 years?
Drought remains an ongoing natural disaster, but early in 2009, Australia was hit badly by both bushfires in Victoria, in the south and massive floods in Queensland's north.
The Last Disaster was created in 1978.
Since 2003 there is at least one or two magnitude 6.5 earthquakes per year in Japan. Once every 10 years there is likely a magnitude 8 or higher earthquake often triggering a tsunami if deep on the ocean floor. Over the last 100 years the frequency of major earthquakes in Japan is increasing.
There have been many natural disasters in New Zealand over the last 100 years. Most notable The Napier Earthquake of 1931, The Tangiwai Disaster of 1953 (caused by Lahar overflow), Christchurch Snow Disaster of 1992. There will be more but these are most notable. Further information can be found on wikipedia.
The one that happened in Japan a few months ago after the earthquake.
Insofar as this contributor knows, Japan was the last major country to commit, but there may have been some smaller countries which waited longer to join in the fight.
Niagara Falls was not created by a natural disaster unless you count the last ice age as a "disaster". The Wisconsin glaciation caused the great lakes to form by sinking the land down and making the basins for the lakes and the falls themselves are a by product of there being a large cliff (the Niagara Escarpment) where the Niagara River happened to flow from Lake Ontario and Lake Erie.