NASA is designing a pair of robotic probes to keep tabs on how the planet is changing and to help forecasters predict natural disasters, such as volcanic eruptions, earthquakes and landslides.
One spacecraft will use radar to look for telltale signs of imminent disaster as it precisely measures small deformations in Earth's surface over time. Scientists hope to be able to zero in on regions that may be in danger so residents can prepare.
Volcanoes, for example, expand like a balloon when the pressure inside them increases, says John LaBrecque, the NASA program scientist for the mission known as Deformation, Ecosystem Structure and Dynamics of Ice, or DESDynI.
"By using radar, we hope to be able to predict the stresses building up in the volcano and hopefully provide a warning of the hazard that is developing," ...
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