The current difficulty is 61,710,102 TH. The next difficulty is estimated at 61,956,942 TH, 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 177,045. The current block reward is 122,954 SC. Based on this and on the current difficulty, miners are being paid 0.0019 SC/TH, which corresponds to about 0.17 SC/day per GH/s.