August 15, 2016. Difficulty rose by +7.67% to 217.38B from 201.89B.
Change
+7.67%
New difficulty
217.38B
Period length
13.0 days
Network hashrate then (7-day)
1.5 EH/s
Bitcoin price then
$567
Hashprice then
$733/PH/day
The 2,016 blocks before it took 13.0 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 7.67%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.