Great Movie but A lot of my friends don't know or remember this actual event?!

Rating: 9/10 (17 February 2017)

This was a great movie. I cried so much while watching this but I just had one questions. I am 22 this year and I remember clearly when this event happened and when the tsunami hit. It was a big deal especially in Aisa, however, when I told my friends about this movie a lot of them seem to not remember or didn't even know about the tsunami that happened. I was very shocked because I thought that it was such a big global disaster so I wonder if a lot of people know about this event before it this movie? I was so baffled by it.