Answer:
<u>The most important methods are: </u>
-Gravimeters
.
-Seismograph
.
-Electricity meters.
-Tiltmeter.
And the most important method to predict volcanic eruption is calculate the volume and flow of magma.
Explanation:
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<u>-Gravimeters</u> capture the gravitational field to detect fluid magma.
<u>-Seismographs</u> are used to calculate the intensity of earthquakes caused by moving magma.
-Magma generates electric currents, for that <u>electricity meters</u>, are used to control the magnetic and magma increase.
<u>-The tiltmeter</u> is a sensor that uses a laser beam to find out if the magma level has dropped or increased and the difference between new and old data is calculated.
Three researchers had the idea of creating a method where the volume and flow of magma are calculated and together with the instruments for calculating eruptions, magma explosions can be predicted in a specific period.