Seismic waves traveling through the Moon can successfully reveal hidden water ice deposits buried deep beneath permanently shadowed polar craters, according to a study published in Science Advances. While orbiting satellites struggle to peer beneath the shallow surface layers of गोली lunar terrain, researchers from the University of Maryland, Lawrence Berkeley National Laboratory, and the University of Hawaii found that listening to subsurface vibrations provides a reliable method to locate trapped resources ahead of crewed missions.
Mapping Lunar Water Ice With Seismic Waves
According to University of Maryland associate professor Nicholas Schmer, understanding what materials astronauts can harvest locally is vital for long-term missions. Because payloads launched from Earth face strict mass limits, finding accessible water ice allows future crews to survive using local resources. When melted and purified, the ice supplies drinking water, while electrolysis separates the water into oxygen for breathing and hydrogen for rocket fuel.
Current orbiting spacecraft are mostly restricted to observing relatively shallow depths. By contrast, seismic waves penetrate deep beneath the lunar regolith. According to the research, ice hardens surrounding materials, causing seismic waves to travel two to three times faster than they do through dry soil. Ice-rich zones also reflect seismic energy rather than letting it pass through freely, a phenomenon similar to an echo striking a wall.
Laboratory Experiments and Computer Simulations
To test their hypothesis, the research team combined three distinct scientific methods. Harrison Lisabeth, a rock physicist at Lawrence Berkeley National Laboratory and lead author of the study, used volcanic rock from Arizona designed to mimic crushed lunar dust. Researchers froze the material and examined how ice accumulates in microscopic spaces using X-rays.
At the same time, co-author Matthew Siegler of the University of Hawaii mapped detailed temperature models for the lunar south pole. These maps pinpointed craters that remained cold enough over billions of years to preserve water ice. Schmer then simulated small moonquakes propagating through buried ice layers at the University of Maryland. All three approaches—laboratory testing, thermal modeling, and computer simulation—consistently showed that buried ice generates clear, measurable changes in seismic signals.
Did you know?
NASA plans to return humans to the lunar surface through its Artemis program, targeting a crewed landing near the Moon’s South Pole by 2028.
Frequently Asked Questions
How do seismic waves detect water ice on the Moon?
Water ice hardens surrounding soil, making seismic waves travel two to three times faster. Ice-rich areas also reflect seismic energy, which sensitive seismometers can detect simultaneously to estimate the presence and relative quantity of ice.
Why can’t orbiting satellites find all the lunar ice?
Orbiting spacecraft are mostly limited to observing shallow surface layers. Seismic waves travel deep underground, allowing researchers to detect deposits buried far beneath permanently shadowed polar craters.
What will the water ice be used for?
Future astronauts plan to melt and purify the ice for drinking water. They can also use electrolysis to split the water into oxygen for breathing and hydrogen for rocket fuel.
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