The current difficulty is 2,457 PH. The next difficulty is estimated at 2,466 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 237,969. The current block reward is 62,030 SC. Based on this and on the current difficulty, miners are being paid 24.4930 SC/PH, which corresponds to about 2.12 SC/day per GH/s.