Earth tremor (5)
'earth tremor' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for quake that I've seen before include "Tremble, shake" , "Tremble (in one's boots?)" , "Vibration of the earth" , "Tremble (with fear)" , "Shudder with fear" .)
'earth tremor' is the definition.
(I've seen this in another clue)
This is all the clue.
(Another definition for seism that I've seen is " Earth-shattering event".)