Which instruments are used to measure minute changes in ground slope and shape of volcanoes?
Which instruments are used to measure minute changes in ground slope and shape of volcanoes?

Q. Which instruments are used to measure minute changes in ground slope and shape of volcanoes?

A.            Strain meters

B.            Tiltmeter

C.            Both a and b

D.            None of these

Answer: C) Both A and B
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