Which of the following methods is NOT useful in forecasting the probability of a volcanic eruption?

Question

Quizplus · Accepted Answer

Reversals in the local magnetic field measured by magnetometers are not typically used to forecast volcanic eruptions. The other methods listed (A-D) are commonly used to monitor changes in a volcano that may indicate an impending eruption, such as swelling of the volcano, earthquakes, changes in Earth's gravity field, and changes in the composition of gases emitted from fumaroles.

Which of the Following Methods Is NOT Useful in Forecasting