September 8, 2021. Difficulty rose by +4.54% to 18.42T from 17.62T.
Change
+4.54%
New difficulty
18.42T
Period length
13.4 days
Network hashrate then (7-day)
134.6 EH/s
Bitcoin price then
$47,046
Hashprice then
$342/PH/day
The 2,016 blocks before it took 13.4 days instead of 14, so the network had more hashrate than the difficulty assumed, and difficulty rose by 4.54%: an ordinary adjustment. For every machine on the network that is a pay cut of the same size until the next retarget.