To find water on Mars, listen to marsquakes

View larger. | Artist’s concept of an aquifer of liquid water on Mars, deep below the surface. A new study from researchers at Penn State University in Pennsylvania shows it could be possible to find such aquifers by listening to marsquakes. Image via ESA/ Medialab.

• If Mars still has any liquid water, it could be found deep underground in aquifers using the seismoelectric method, say researchers at Penn State University.
• Seismic waves from marsquakes would move through water, creating unique electromagnetic signals.