The boxing day 2004 tsunami was situated in the Indian ocean. It affected 14 countries and it caused the entire planet to vibrate as much as 1cm. The most affected countries were Indonesia, Sri Lanka, India and Thailand. It had a magnitude of 9.0 - 9.3 - I only know this because I'm doing a geogrephy project on it and found lots of info on the internet. Hope this helps!
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