There was a short term move over to BCH (BCC is NOT Bitcoin Cash, it's BitConnect Coin which LONG predates Bitcoin Cash) when it briefly got more profitable to mine than BTC - lasted perhaps a day and a half and collapsed the profitablity due to at least one MAJOR farm moving over, now it's moving back (almost all of it IS back) as BCH profitability collapsed due to the massive hashrate influx.

 Also, when Bitmain isn't shipping a batch of S9 units (and for a few days WHEN they are shipping a batch), the hashrate tends to be close to flat as nobody else is shipping or manufacturing large numbers of miners (yet).