If you are talking about Steemit blogging
Than the amount is not really certain. While at start the amount will be not that much but as time approaches and once one get to know the platform pretty well the amount will start to rise.
The amount of earning depends on other factors as well :
Apart from that there are many dapps that will increase the income of a blogger in here as well.
I have seen users to get 10 cents upvote in a post while 1000 USD aas well in a single post.
To be honest going to that level of 1k USD many have misused the system of Steem Blockchain . While if not that level but a decent income could be gained by blogging in Steemit.