Question

A tiltmeter is a volcanic monitoring tool that measures _____. A.vibrations and tremors in the ground B.smoke plumes C.ground swelling D.water levels

Answer 1

A tiltmeter is a volcanic monitoring tool that measures ground swelling .

Answer 2

The correct option is C.
A tiltmeter is a very sensitive instrument used by geologists to detect very small changes in the vertical position or the ground structure movement during the process of volcanic monitoring. The device measures the tilt of the concerned land area. The device is also used to measure the reaction of dams to filling and to monitor landslides.