iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
NASA’s Lunar Reconnaissance Orbiter images show thousands of young thrust-fault scarps on the Moon, but the authoritative NASA records cited for this finding map more than 3,200—not a confirmed 10,000. Their apparent youth and association with shallow moonquakes suggest that lunar tectonic activity may still be occurring, which matters for Artemis landing sites, rovers and future habitats.
What the lunar images actually show
The features are called lobate scarps: small, cliff-like steps where compressional forces broke the crust and pushed one block upward and over another. NASA attributes much of that compression to the Moon’s still-hot interior cooling and contracting. As the interior loses heat, the Moon’s volume decreases and its crust is forced together.
Earth’s solid-body tides also alter the stress field. That helps explain why the scarps’ orientations are not random, rather than being arranged as they would be if cooling were the only force involved.
Do these 3 things before closing this tab:
1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesThe 2010 Science study that established the modern picture found scarps alongside meter-scale graben, splay faults and low-relief terraces. Together, these structures record a range of brittle deformation rather than a single isolated type of fracture.
#1 Best Overall
Why scientists classify many scarps as young
Scarps can look fresh in orbital photographs for several geological reasons. The mapped examples have sharp, crisp profiles, few large craters superimposed on them, and in some cases cut across smaller craters. Those relationships indicate that the faulting happened after the craters formed. Scientists also consider how quickly lunar debris, or regolith, should soften and fill a landform.
NASA’s 2017 technical summary places the mapped scarps at less than 50 million years old on that evidence. That is extremely recent compared with the Moon’s age of about 4.5 billion years. “Young” does not mean every scarp slipped recently, however; it means the landform formed late enough in lunar history to retain these signs of freshness.
Rank #2
What is confirmed about the “10,000 faults” headline
NASA releases from 2015 and 2017, along with the NASA Technical Reports Server summary, repeatedly cite a globally mapped population of more than 3,200 lobate thrust-fault scarps. The exact figure of 10,000 is not established by those authoritative sources. It should therefore be treated as an unconfirmed headline number, not as NASA’s settled catalog total.
The distinction matters because a scarp is a surface expression of faulting, not necessarily a separately measured fault plane or an independently active earthquake source. Future image analysis could expand the catalog, but the currently documented evidence supports “thousands of young faults,” with more than 3,200 mapped scarps as the published benchmark.
Is the Moon still shrinking?
NASA reported in 2019 that the Moon has contracted by more than 50 meters over several hundred million years. That cumulative change is consistent with ongoing thermal cooling, although it does not mean the surface moves continuously or uniformly. Contractional stress can accumulate for long periods and then be released in a short, shallow moonquake or a small episode of fault slip.
What the seismic evidence says
Researchers combined orbital fault locations with the Apollo-era seismic record in a 2019 Nature Geoscience study. Of eight analyzed shallow moonquakes, six occurred near lunar apogee, when the Moon is farthest from Earth and the cited tidal stresses favor slip on some faults. NASA reported that 10,000 simulations put the chance of obtaining that concentration near peak stress at less than 4 percent.
Rank #4
The study also found that fault proximity, disturbed regolith and moved boulders fit a picture of tectonic activity. Those observations make ongoing lunar tectonism plausible—and in some cases strongly supported—but they do not identify every mapped scarp as active today. The seismic sample is small, and the Apollo instruments operated at a limited number of locations, so the present activity rate and the behavior of individual faults remain uncertain.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Why this matters for Artemis and lunar infrastructure
A fault scarp can mark the source region of shallow shaking. NASA has highlighted a young scarp at de Gerlache Rim 2, a candidate region for Artemis III, and says modeling indicates that its formation could have been associated with a moonquake of recorded magnitude. That does not show that an Artemis landing there would fail, but it makes local fault mapping part of responsible site assessment.
Best Value
Potential consequences include shaking of a lander during or after touchdown, movement of loose regolith, falling or shifting boulders, and damage to rigid structures or buried utilities. A lunar event is not equivalent to an Earth plate-boundary earthquake: moonquakes are sparse, the Moon has no active plate system like Earth’s, and the available record is limited. Nevertheless, low frequency does not eliminate risk when a crewed base, rover route or power system is placed close to a fresh scarp.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How mission planners can evaluate a candidate site
No published NASA ranking establishes one landing region as safest on tectonic grounds. A practical screening process should combine the following factors:
| Decision factor | Why it matters |
|---|---|
| Distance to mapped scarps | Greater separation reduces exposure to a nearby rupture source and abrupt slope changes. |
| Scarp freshness and estimated age | Crisp relief, crater crosscutting and limited infilling identify areas that may have formed relatively recently. |
| Local tidal and contractional stress | Stress modeling can indicate when and where slip is more likely, including around lunar apogee. |
| Seismometer coverage | Sites near existing or planned instruments can be monitored better than areas with no local seismic data. |
| Slope, boulders and regolith stability | Shaking can destabilize loose material even if the main structure remains intact. |
| Engineering tolerance | Habitat foundations, anchors, rover paths and power links need designs matched to expected movement and vibration. |
These are engineering decision axes, not a NASA-certified safety score. The most valuable improvement would be a modern, distributed lunar seismic network that can locate shallow events and measure their ground motion directly.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallWhat NASA says should happen next
NASA planetary seismologist Renee Weber summarized the operational need: “Establishing a new network of seismometers on the lunar surface should be a priority for human exploration of the Moon, both to learn more about the Moon’s interior and to determine how much of a hazard moonquakes present.” New instruments could establish local background activity, detect whether particular scarps are slipping, and provide the measurements needed for structural design.
The defensible conclusion is therefore narrower than the viral headline: the Moon has thousands of geologically young thrust-fault scarps, lunar contraction continues on a long-term scale, and several lines of evidence point to possible present-day tectonic activity. That combination is a reason to map, monitor and design carefully—not evidence that 10,000 faults are all active or that every Artemis site is unsafe.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
