April 14, 2018. Difficulty rose by +9.35% to 3.84T from 3.51T.
Change
+9.35%
New difficulty
3.84T
Period length
12.8 days
Network hashrate then (7-day)
28.2 EH/s
Bitcoin price then
$7,895
Hashprice then
$494/PH/day
The 2,016 blocks before it took 12.8 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 9.35%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.