October 22, 2016. Difficulty fell by -1.90% to 253.62B from 258.52B.
Change
-1.90%
New difficulty
253.62B
Period length
14.3 days
Network hashrate then (7-day)
1.8 EH/s
Bitcoin price then
$629
Hashprice then
$668/PH/day
The 2,016 blocks before it took 14.3 days, longer than the 14 intended, so hashrate had fallen, and difficulty fell by 1.90%: an ordinary adjustment. For every machine on the network that is a pay rise of the same size until the next retarget.