Because the difficulty is calculated over the entire 2016 block period! Your only looking at the begin and end points of the hashrate but diff as said is calculated over the entire period and thus the average hashrate in that period.
An analogy would be to think of a car going 60 mph and the diff is the distance travelled in a given timeframe. If the car keeps steady at 60 then diff will be x but if the car speeds up in between to say 100 mph and then goes back to 60 mph at the end of the timeframe the distance travelled will be larger because the average speed over the timeframe was higher and thus the diff wil be >x despite the begin and speeds being 60 mph.
Yeah, I know that too. But the question still stands
Hashrate on 12/30 290,919,288 GH/s
now 291,423,304 GH/s
FLATDiff. estimate now ca. +8%
Where is the 23 PH/s increase (290 PH/s + 8%) in hashrate going to come from ?
Somehow I doubt that the estimate will tank to about zero in two days.
Read this part again:
Because the difficulty is calculated over the entire 2016 block period! Your only looking at the begin and end points of the hashrate but diff as said is calculated over the entire period and thus the average hashrate in that period.
An analogy would be to think of a car going 60 mph and the diff is the distance travelled in a given timeframe. If the car keeps steady at 60 then diff will be x but if the car speeds up in between to say 100 mph and then goes back to 60 mph at the end of the timeframe the distance travelled will be larger because the average speed over the timeframe was higher and thus the diff wil be >x despite the begin and speeds being 60 mph.
The hashrate climbed quickly to ~330 Ph about 1/2 way through the last difficulty. A few days ago, hashrate has dropped to ~290 Ph. Since the difficulty to measured across 2016 blocks and not instantly, and the 1st 1/2 of this difficulty was during high hashrate, the difficulty will increase even with the hashrate drop. Because the hashrate is going to be under the next difficulty, there may be a drop in the difficulty after next.
Please read more about blocks and difficulty before you post again instead of shooting out dozens of poorly made posts a day.