Earth-shaking event (6)
I believe the answer is:
tremor
(Other definitions for tremor that I've seen before include "Vibration - shaking" , "make one shake" , "Quaver" , "Vibration from earthquake" , "Slight earthquake" .)
I believe the answer is:
tremor
(Other definitions for tremor that I've seen before include "Vibration - shaking" , "make one shake" , "Quaver" , "Vibration from earthquake" , "Slight earthquake" .)