NASA’s Farside Seismic Suite, equipped with advanced seismometers, aims to study the Moon’s far side in 2026, offering new insights into its seismic activity and geological structure.
This mission will provide the first seismic data from the area in decades, contributing significantly to lunar science. The technology behind its two seismometers was used to detect more than a thousand Red Planet quakes.
The most sensitive instrument ever built to measure quakes and meteor strikes on other worlds is getting closer to its journey to the mysterious far side of the Moon. It’s one of two seismometers adapted for the lunar surface from instruments originally designed for NASA’s InSight Mars lander, which recorded more than 1,300 marsquakes before the mission’s conclusion in 2022.
Part of a payload called Farside Seismic Suite (FSS) that was recently assembled at NASA’s Jet Propulsion Laboratory (JPL) in Southern California, the two seismometers are expected to arrive in 2026 at Schrödinger basin, a wide impact crater about 300 miles (500 kilometers) from the Moon’s South Pole. The self-sufficient, solar-powered suite has its own computer and communications equipment, plus the ability to protect itself from the extreme heat of lunar daytime and the frigid conditions of night.
Renewing Lunar Seismic Research
After being delivered to the surface by a lunar lander under NASA’s CLPS (Commercial Lunar Payload Services) initiative, the suite will return the agency’s first seismic data from the Moon since the last Apollo program seismometers were in operation nearly 50 years ago. Not only that, but it will also provide the first-ever seismic measurements from the Moon’s far side.
Up to 30 times more sensitive than its Apollo predecessors, the suite will record the Moon’s seismic “background” vibration, which is driven by micrometeorites the size of small pebbles that pelt the surface. This will help NASA better understand the current impact environment as the agency prepares to send Artemis astronauts to explore the lunar surface.
Investigating Moonquakes and Lunar Structure
Planetary scientists are eager to see what FSS tells them about the Moon’s internal activity and structure. What they learn will offer insights into how the Moon — as well as rocky planets like Mars and Earth — formed and evolved.
It will also answer a lingering question about moonquakes: Why did the Apollo instruments on the lunar near side detect little far-side seismic activity? One possible explanation is that something in the Moon’s deep structure essentially absorbs far-side quakes, making them harder for Apollo’s seismometers to have sensed. Another is that there are fewer quakes on the far side, which on the surface looks very different from the side that faces Earth.
“FSS will offer answers to questions we’ve been asking about the Moon for decades,” said Mark Panning, the FSS principal investigator at JPL and project scientist for InSight. “We cannot wait to start getting this data back.”
Technology Transfer: Mars to Moon
Farside Seismic Suite’s two complementary instruments were adapted from InSight designs to perform in lunar gravity — less than half that of Mars, which, in turn, is about a third of Earth’s. They’re packaged together with a battery, the computer, and electronics inside a cube structure that’s surrounded by insulation and an outer protective cube. Perched atop the lander, the suite will gather data continuously for at least 4½ months, operating through the long, cold lunar nights.
The Very Broadband seismometer, or VBB, is the most sensitive seismometer ever built for use in space exploration: It can detect ground motions smaller than the size of a single hydrogen atom. A fat cylinder about 5 inches (14 centimeters) in diameter, it measures up-and-down movement using a pendulum held in place by a spring. It was originally constructed as an emergency replacement instrument (a “flight spare”) for InSight by the French space agency, CNES (Centre National d’Études Spatiales).
Philippe Lognonné of Institut de Physique du Globe de Paris, the principal investigator for InSight’s seismometer, is an FSS co-investigator and VBB instrument lead. “We learned so much about Mars from this instrument, and now we are thrilled with the opportunity to turn that experience toward the mysteries of the Moon,” he said.
The suite’s smaller seismometer, called the Short Period sensor, or SP, was built by Kinemetrics in Pasadena, California, in collaboration with the University of Oxford and Imperial College, London. The puck-shaped device measures motion in three directions using sensors etched into a trio of square silicon chips each about 1 inch (25 millimeters) wide.
Assembling and Testing the Seismic Suite
The FSS payload came together at JPL over the last year. In recent weeks, it survived rigorous environmental testing in vacuum and extreme temperatures that simulate space, along with severe shaking that mimics the rocket’s motion during launch.
“The JPL team has been excited from the beginning that we’re going to the Moon with our French colleagues,” said JPL’s Ed Miller, FSS project manager and, like Panning and Lognonné, a veteran of the InSight mission. “We went to Mars together, and now we’ll be able to look up at the Moon and know we built something up there. It’ll make us so proud.”
More About the Farside Seismic Suite
The Farside Seismic Suite (FSS), managed by the Jet Propulsion Laboratory (JPL) in Pasadena, a division of Caltech, represents a significant leap in lunar exploration. This ambitious project, designed, assembled, and tested by JPL, is a collaborative international effort, including critical components from various global partners. The French space agency, CNES, along with the Institut de Physique du Globe de Paris, contributed the Very Broadband seismometer, supported by Université Paris Cité and the CNRS. Meanwhile, the Short Period sensor was developed through a collaboration between Imperial College London, the University of Oxford, and managed by Kinemetrics in Pasadena. The University of Michigan supplied the necessary flight computer, power electronics, and software, completing this sophisticated scientific package.
As a part of NASA’s PRISM (Payloads and Research Investigations on the Surface of the Moon) initiative, FSS is funded by the Exploration Science Strategy and Integration Office within NASA’s Science Mission Directorate. Program management is provided by the Planetary Missions Program Office at NASA’s Marshall Space Flight Center. The suite is scheduled to land on the Moon’s surface as part of an upcoming mission under NASA’s Commercial Lunar Payload Services (CLPS) initiative, aiming to provide unprecedented seismic data from the Moon’s far side—a region never before explored seismically.
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1 Comment
“Moonquake” and “marsquake” are not as clever coinages as you’d like them to be. In fact, they sound re****ed when you think about them. You should use “earthquake” for Moon and Mars, too.
“Earthquake” is an old compound word made of two words no longer in wide usage in their original meaning. The word “quake” fell out of use virtually altogether, which should tell you how old the coinage itself is, and the word “earth” used to stand for “ground” or “soil” long before it came to designate the entire planet. In “earthquake” the word “earth” clearly designates the ground. It’s the ground under your feet that’s “quaking” (today we’d say “trembling” or “shaking”), not the entire planet.
Therefore, it’s proper to say “earthquake on the Moon” and “earthquake on Mars”, because quakes are local phenomena over there, too.