Thank goodness!
After seeing 'ERC' countless times, finally someone spelled it out!
Now, I'll ask my dumb question:
What does it mean? (What happens during the ERC?)
Eyewall Replacement Cycle.
My knowledge is limited. Check the previous threads, or some of the hurricane geeks (no offense intended)
Eyewall Regeneration (Replenishment) cycle - the eyewall shifts, breaksdown and reforms as it rotates and as conditions vary.
In an eyewall replacement cycle the inner eye disolves as a newer/larger one forms around it. They happen with most storms, and it's become a very overused term. One has happened today though. During the cycle, the storm typically loses some of its punch. As the new eye take over and contract, there is usually some strengthening if other conditions are favorable.