That's a little strange.
I really thought the graph would be more skewed for USA (i.e. est) times.
From this it looks like the EST steemers are only on at work (or school?) between 9am EST and 4pm EST.
I was really expecting a peak around 9pm EST ( 1am UTC) and there is a LITTLE peak, but what 25% lower than the UTC crowd at 4pm ?
I s Steem not as popular in the USA as I think it is?
... or everybody steems from work?
Naah, who possibly would kill time browsing around while at work ...