Geologist installed tiltmeters in a tectonically active area.Tiltmeters can detect very small changes in the?

Question

slope(tilt)of earth's surface.These changes result from the upward movement of magma beneath earth's surface.What event could be predicted by monitoring these changes? A.a potential volcanic eruption B.reversal of earth's magnetic field C.a change in the composition of earth's crust D.decreased thermal energy transfer within earth.

Answer 1

Tiltmeters (and very accurate line surveys) are used to detect the bulging of the surface as magma fills a magma chamber. Along with geochemical analysis if there are fumartoles, and microgravity surveys these methods are used to predict potential volcanic eruptions.

High resolution satalite altimetry does a pretty similar job too