September 21, 2021. Difficulty rose by +3.16% to 19.00T from 18.42T.
Change
+3.16%
New difficulty
19.00T
Period length
13.6 days
Network hashrate then (7-day)
140.2 EH/s
Bitcoin price then
$42,450
Hashprice then
$324/PH/day
The 2,016 blocks before it took 13.6 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 3.16%: an ordinary adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.