July 17, 2018. Difficulty fell by -3.45% to 5.18T from 5.36T.
Change
-3.45%
New difficulty
5.18T
Period length
14.5 days
Network hashrate then (7-day)
36.3 EH/s
Bitcoin price then
$6,810
Hashprice then
$327/PH/day
The 2,016 blocks before it took 14.5 days, longer than the 14 intended, so hashrate had fallen, and difficulty fell by 3.45%: an ordinary adjustment. For every machine on the network that is a pay rise of the same size until the next retarget.