Drones equipped with mass spectrometers could also prove useful for predicting eruptions.
Nearly 1,100 miles away from Mount Rainier, volcanologists at JPL in Pasadena, California, are developing tiny mass spectrometers — which can detect gases as they move through sunlight — that can be mounted on drones.
These devices work because volcanoes emit certain gases in a specific order before an eruption, in a process that begins years before magma reaches the surface. An increase in carbon dioxide means you have potentially months before an eruption, says JPL’s Pieri. If it’s sulfur dioxide?
“Then you’re looking at an imminent eruption,” he says.
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