when a pool finds a block, another block is often found by the same pool shortly

[bussumseheide]

when I look at https://btc.com/ (all the time) to see if kanopool or slushpool did find a block -my personal favorites-, I noticed that it happens very often that when a pool finds a block, a second block is found by the same pool within a short time.

How can this be explained? I don't believe it is fully explainable by 'luck' because it happens quite often, by all pools.

[VRobb]

Belief has nothing to do with it, it's all part of statistical variance or 'luck'.  Nothing to see here, move along, and mine on! 

[Alexbit2017]

agree