From block 84576, due to arrive around 5PM GMT Sunday, the block reward will drop from 77 coins per block to just 16 coins per block! This will then halve after 30 days to 8 coins per block. Then a further 30 days after that there will only be 4 coins per block. For 4 years there will be 4 coins per block, with 1 block every minute. After 4 years the reward will change to 2 coins per block, after 2 years it will halve again to 1 coin per block for 3 years.