The researchers published their findings in the Journal of Geophysical Research: Planets and suggest that electromagnetic signals produced by planetary earthquakes could help detect groundwater on Mars.
There is an assumption that there were oceans on Mars before and some of the water is still preserved in underground formations. A new approach uses sounds from Mars rovers to determine the presence of water on the planet.
Scientists have proposed using the seismoelectric technique, developed to study Earth’s subsurface formations, to analyze the electromagnetic fields created by water formations through which seismic waves pass.
Source: Ferra

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