The current difficulty is 46,726,271 TH. The next difficulty is estimated at 46,864,012 TH, a change of +0.29%. 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 159,594. The current block reward is 140,405 SC. Based on this and on the current difficulty, miners are being paid 0.0029 SC/TH, which corresponds to about 0.25 SC/day per GH/s.