Event Horizon fluctuating due to gravitational waves

Question

Do the interiors of black-holes create gravitational waves and if so do these waves cause the radius of the event horizon to fluctuate as the waves pass the horizon ?

Answer 1

Distortions of the horizon do cause gravitational waves to radiate, an effect known as the 'ringdown' of the black hole horizon.

Effects happening inside of the interior of the blackhole cannot cause distortions of the horizon.