It's not you ... they are more FREQUENT and STRONGER.
1) There was an unusually long and flukey period between the last long-range teletsunami (1964) and 2004.
2) Simple attention affect and the rise of global media. There were a number of deadly local tsunamis betwen 1964 and 2004 in places like Nicaragua, New Guinea, etc. that killed hundreds and even thousands of people that went totally unnoticed. Similar tsunami now get massive coverage.
Shhh...
Don’t tell.
All kidding I am with you.