September 26, 2019. Difficulty rose by +7.31% to 12.76T from 11.89T.
Change
+7.31%
New difficulty
12.76T
Period length
13.1 days
Network hashrate then (7-day)
89.2 EH/s
Bitcoin price then
$8,939
Hashprice then
$197/PH/day
The 2,016 blocks before it took 13.1 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 7.31%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.