“Mr. Speaker, from hurricanes and floods in Latin America to earthquakes in Asia, natural disasters are increasingly becoming a regular feature of life for large numbers of people around the globe.”
- Earl Blumenauer

The recent earthquakes in Japan was one of the worst in the past decade. Although the asiesmic designed buildings proved to be effective and sturdy, it was no match for the secondary impact -the tsunami- which had a larger effect on Japan.
http://www.abc.net.au/news/infographics/earthquakes/
http://www.abc.net.au/news/events/japan-quake-2011/beforeafter.htm
http://www.bbc.co.uk/news/world-asia-pacific-12722187
http://www.bbc.co.uk/news/world-asia-pacific-12748215
To aid your understanding on the relationship between earthquakes and tsunamis:
With urbanisation taking place, many cities like Tokyo and Tehran have over 3 million people living there. With such cities lying along major fault lines, is there a method to predict large magnitude earthquakes like the recent Japan earthquake?
http://www.bbc.co.uk/news/science-environment-12792943
The importance of community in managing earthquakes:
This Japanese animation demonstrates the formation and path of a tsunami:
http://nettv.gov-online.go.jp/prg/prg850.html