Yep, it is a normal cycle thing we have never been aware of before so we are making a huge guess about everything.
BTW it could be The End of the World, we need 100 million in Grant money to study this.
and OMG more to stop Man made Global Core Shifting caused by removing Oil weight from certain areas which causes rotational stability issues as well as pollution and global warming which causes polar bears to drown
Just need to drill to the core and install ball bearings.