Blurt is a fork of steem just like hive.
It was created on 4th July 2020.
Every account that existed on steemit before the said date got 1:1 airdrop of what they had in steem as blurt.
That is why you have 47 blurt over there.
That's exactly the amount of steem you had on 4 July 2020.
You can login with your steemit password.
Do your introduction post and start earning.