Why is topographic monitoring sometimes useful in forecasting a volcanic eruption?
A)A volcano sometimes swells as lava moves into the edifice.
B)Volcanic eruption is more likely as an area undergoes tectonic uplift.
C)Seismic activity occurs as the volcano rises.
D)Topographic monitoring reveals the likelihood of lahar generation.

Question

Quizplus · Accepted Answer

Topographic monitoring can detect changes in the shape and height of the volcano, such as swelling caused by magma moving into the volcano. This can be an indication of an impending eruption.

Why Is Topographic Monitoring Sometimes Useful in Forecasting a Volcanic