September 20, 2018. Difficulty rose by +1.90% to 7.15T from 7.02T.
Change
+1.90%
New difficulty
7.15T
Period length
13.8 days
Network hashrate then (7-day)
49.4 EH/s
Bitcoin price then
$6,496
Hashprice then
$247/PH/day
The 2,016 blocks before it took 13.8 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 1.90%: an ordinary adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.