The phrase "slight tremor" means a very small and gentle shaking or trembling movement.
Sentences with «slight tremor»
I can also hear slight tremors in my voice when I talk, kind of like when someone taps on your back or chest while you say «ahhhhh.» (mechanics.stackexchange.com)
Slight tremors felt around the French city of Rouen were traced to the body of Richard the Lionhearted, spinning wildly in its grave. (religion.blogs.cnn.com)
Karyiarsa said refugees from the mountains were continuing to flee to his village and he had felt several slight tremors over recent days. (theguardian.com)