This might explain my observations here https://stacker.news/items/271807/r/WeAreAllSatoshi

WeAreAllSatoshi

bitcoin

Hunting the Real Bitcoin Network Hashrate

k00b


> I concluded my earlier essay with an area of potential future research: comparing realtime hashrate reported by mining pools against the hashrate estimates derived solely from trailing blockchain data.

There is no pool realtime hashrate metric unless you are miner and you know the exact hashrate at any given moment reported by ur machines. Pools in fact don't know the realtime hashrate they barely estimate it based on shares. 