The phrase "about this tragedy" is correct and usable in written English.
It can be used when discussing or referring to a specific tragic event or situation.
Example: "The community held a vigil to reflect on and talk about this tragedy that affected so many lives."
Alternatives: "regarding this tragedy" or "concerning this tragedy".
I only learned about this tragedy this year, and it made me physically ill and sad, for I am the daughter of a woman whose skin is beautiful and darker than mine.
Those words don't represent how I feel about this tragedy".
"She talked about this tragedy and pulling together whether you're a Democrat or Republican".
The infuriating thing about this tragedy is that it was completely unnecessary.
Conspiracy theories of all kinds abound, not just about the disappearance of Madeleine McCann – but now also about this tragedy.
Police spokesperson Smith said that "so many young people on social media talking about this tragedy, they are out assisting us in getting that information".
"The difference between this movie and those made about 9/11 and other tragedies is that this fictional account comes as we're still waiting to get the truth about why this tragedy happened," said Pilar Vera, president of the association.
"This is about restoring public trust," he went on, "and giving the families and crash victims the truth about whether this tragedy could have been prevented and if future ones will be prevented".
You were almost always my best friend and you are still my best friend, so that's why I'm sitting here and writing to you about all this tragedy that has befallen me.
And there will be questions about whether this tragedy could have been prevented or if signs were ignored.
But the same children learning to deal with an unspeakable horror didn't mince words about how this tragedy could have been prevented: gun control.
