“Spiders” Predict Eruptions

SaintHelensNASA is using high-tech devices to help predict when a volcano might erupt. Small pods called “spiders” have been lowered into and placed around Washington state’s Mount St. Helens, which erupted severely in 1980.

These spiders are equipped with a seismometer, GPS receiver, infrared sounder and lightning detector. The pods can go where people can’t, and they are designed to sense magma rising to the Earth’s surface, even miles below the ground.

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