The current difficulty is 5,251 PH. The next difficulty is estimated at 5,264 PH, a change of +0.25%. 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 283,250. The current block reward is 30,000 SC. Based on this and on the current difficulty, miners are being paid 5.5417 SC/PH, which corresponds to about 0.48 SC/day per GH/s.