September 6, 2017. Difficulty rose by +3.89% to 922.72B from 888.17B.
Change
+3.89%
New difficulty
922.72B
Period length
13.5 days
Network hashrate then (7-day)
7.5 EH/s
Bitcoin price then
$4,385
Hashprice then
$1,207/PH/day
The 2,016 blocks before it took 13.5 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 3.89%: an ordinary adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.