January 14, 2020. Difficulty rose by +7.08% to 14.78T from 13.80T.
Change
+7.08%
New difficulty
14.78T
Period length
13.1 days
Network hashrate then (7-day)
105.9 EH/s
Bitcoin price then
$8,105
Hashprice then
$147/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 7.08%: a large adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.