There are some cases, in Thorchain, that a node can be ruled out, and there are some requirements to step in as new node. overall, this event is called "churning". for example, a node can request to churn out, it can be banned by other node due to bad acting, etc. these events are recorded in blocks and in table below we demonstrated which blocks had the most number of churning events and its respective time.

These Churning Events seems to be more periodically that reacting on market or network status. there are some churn in and out every 2 or 3 days but as chart suggest numbers are not constant. one theory could be that since churning in requires to churn out the node with lowest bond, so a market deep might persuade some to start a node with more bonded rune, or any whale entering the seen can change the course of the game.