September 7, 2018. Difficulty rose by +4.34% to 7.02T from 6.73T.
Change
+4.34%
New difficulty
7.02T
Period length
13.4 days
Network hashrate then (7-day)
47.9 EH/s
Bitcoin price then
$6,772
Hashprice then
$279/PH/day
The 2,016 blocks before it took 13.4 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 4.34%: an ordinary adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.