The current difficulty is 2,906 PH. The next difficulty is estimated at 2,918 PH, a change of +0.40%. The difficulty changes globally every time a new block is mined, based on how fast blocks are being found.
Hash Price Report
The last block was at height 254,045. The current block reward is 45,954 SC. Based on this and on the current difficulty, miners are being paid 15.3373 SC/PH, which corresponds to about 1.33 SC/day per GH/s.