Question

An instrument that measures vibrations of the Earth is called

Answer 1

Vibrations of the earth is measured by Seismograph

Answer 2

$\huge\bold\green{Answer}$

$\mathsf{An \: \: instrument \: \: that \: \: measures}$
$\mathsf{vibrations \: \: of \: \: the \: \: earth \: \: is \: \: called}$
$\mathsf{ Seismograph.}$