Why Geologists Just Proved That Devils Tower Is Constantly Moving

In March 2026, a team of geologists published a study in the journal GSA Today that fundamentally altered how we perceive one of North America’s most recognizable landmarks. Devils Tower—the massive, ribbed monolith that rises abruptly out of the rolling pine forests of northeastern Wyoming—is not the static, silent sentinel it appears to be.

According to the study, titled "Tower in Motion: Resonance Mode Analysis of Devils Tower, Wyoming, USA," this iconic 867-foot-tall volcanic mass is in a state of perpetual, microscopic motion. It bends, sways, and twists in a complex, three-dimensional dance every single second of every single day.

Led by Jeffrey R. Moore, a professor of geology and geophysics at the University of Utah, alongside independent researcher Kathryn Vollinger and geophysicist Jan Burjánek from the Czech Academy of Sciences, the research represents a major milestone in the field of ambient vibration modal analysis. By capturing the physical "voice" of Devils Tower, the team did more than just measure its vibrations; they unlocked a treasure trove of structural data, revealing that the tower’s legendary hexagonal columns make it far more flexible—and resilient—than anyone had ever calculated.

For decades, millions of visitors have stared up at the sheer cliffs of the monument and asked a simple question: is devils tower moving? Historically, the answer was a simple "no," accompanied by explanations of how the tower slowly erodes over millions of years. Today, however, the definitive scientific answer to whether is devils tower moving is a resounding and fascinating yes. It moves dynamically, in real-time, responding directly to the quietest whispers of the Earth and the strongest gusts of the Great Plains.

Behind the Scenes of the Summit Deployment: The Logistics of "Listening" to a Colossus

To understand how geologists proved this constant movement, one must look beyond the clean charts of the published paper to the challenging physical work that made the data collection possible. Devils Tower is not a place where you can simply park a truck and set up a tripod. Rising 867 feet from its base to its flat summit (and standing 1,267 feet above the nearby Belle Fourche River), the monolith is a sheer vertical wall of phonolite porphyry, a rare, hard volcanic rock.

                [ Summit Seismometer ] -> Captures 1.1 Hz, 1.2 Hz, and 2.1 Hz (Torsion)
                     /           \
                    /             \  <- Sheer Columnar Jointing (Phonolite Porphyry)
                   /               \
                  /                 \
  [ Base Sensor 1 ]                 [ Base Sensor 2 ] -> Ground Control / Reference Noise

In October 2024, the research team set out to place a highly sensitive broadband seismometer directly on the tower’s summit. This required navigating strict National Park Service (NPS) permitting, climbing restrictions, and the profound cultural sensitivities of the site. Devils Tower, known to indigenous peoples as Mato Tipila (Bear Lodge) or Matȟó Thípila, is a deeply sacred place to more than 20 Native American tribes, including the Lakota, Cheyenne, Kiowa, Crow, and Shoshone.

The logistics were formidable. The team could not use drones or helicopters, which would disturb the nesting falcons and violate both park wilderness regulations and cultural protocols. The equipment had to be packed up the rock face by hand. Kathryn Vollinger, a seasoned climber and co-author of the study, scaled the sheer columns carrying a delicate, heavy payload:

A Nanometrics Trillium Compact broadband seismometer (a high-precision instrument capable of measuring ground velocity in three orthogonal directions).
A ruggedized, weather-sealed data logger to record the massive influx of seismic data.
A high-capacity lithium-iron-phosphate battery pack to power the setup overnight.
A GPS antenna to ensure microsecond-level time synchronization with ground-based reference sensors.

While Vollinger climbed to the summit, other members of the team deployed two identical seismometers around the base of the tower. These base stations served as "ground control," allowing the researchers to filter out local seismic noise and isolate the specific, unique vibrations of the tower itself.

The summit instrument remained active for 21 hours. During this window, the seismometer sat silently on the tower's flat, cactus-strewn top, recording millions of data points. As the wind howled across the Wyoming plains and the deep crust of the Earth vibrated with ambient noise, the instrument recorded every micrometer of the monolith's swaying and twisting.

The Physics of the Hum: What is Ambient Vibration Modal Analysis?

To understand how a 265-meter-high rock tower can be constantly in motion, it helps to understand the physics of ambient vibration modal analysis (AVMA). This is a technique adapted from civil engineering, where structural health monitors are placed on skyscrapers, suspension bridges, and wind turbines to assess how they respond to dynamic loads.

The Earth is never truly quiet. It is filled with a continuous, low-frequency hum known as ambient seismic noise. This noise is generated by a vast array of global and local sources:

Microseisms: The relentless crashing of ocean waves against coastlines thousands of miles away, which sends low-frequency elastic waves traveling through the continental crust.
Atmospheric Activity: Wind slamming into landforms, passing weather fronts, and localized barometric pressure changes.
Anthropogenic Noise: The distant rumble of trains, highway traffic, heavy industry, and mining activities.

When these ambient seismic waves travel through the bedrock and reach a freestanding structure like Devils Tower, they act like a gentle, continuous hand pushing on a playground swing. While the ground beneath the tower is vibrating randomly across a broad spectrum of frequencies, the tower itself acts as a physical mechanical filter. It selects specific, preferred frequencies—its resonant frequencies—and amplifies them.

"It’s similar to playing a note on a piano," Jeffrey Moore explained in an interview following the publication. "If you looked at the sound wave of that, it wouldn’t look like much, but if you looked at the frequency, it would tell you quite a lot about the instrument itself".

Every freestanding object has a set of natural frequencies and corresponding "mode shapes" that describe how it deforms when excited. By measuring this "ambient hum" at the top of the tower and comparing it to the ground motion at the base, Moore’s team was able to isolate the exact resonance modes of Devils Tower with absolute mathematical precision.

The Three Modes of Motion: Bending, Swaying, and Twisting

When the researchers analyzed the 21 hours of seismic data, they discovered three distinct peaks in the frequency spectrum, corresponding to three fundamental resonance modes. The movements are incredibly tiny—measured in fractions of a micrometer (millionths of a meter)—but they are constant and highly structured.

  ===================================================================
   Resonance Mode   Frequency (Hz)   Type of Motion      Direction
  ===================================================================
     Mode 1            1.1 Hz        Full-Height Sway   East-West
     Mode 2            1.2 Hz        Full-Height Sway   North-South
     Mode 3            2.1 Hz        Torsional Twist    Rotational
  ===================================================================

The Bending Modes (1.1 Hz and 1.2 Hz)

The first two resonance modes of Devils Tower occur at 1.1 Hz and 1.2 Hz. A frequency of 1.1 Hz means the tower sways back and forth roughly 1.1 times per second—a tempo remarkably close to a calm, resting human heartbeat.

The physical shape of these modes represents "full-height cantilever bending." The entire tower acts like a giant, vertical beam anchored to the Earth, swaying back and forth.

What makes Devils Tower geologically unique is how close these two frequencies are to one another. In many rock formations, such as Utah's thin sandstone fins, the bending frequencies are highly asymmetric because the landform is much wider in one direction than the other. Because Devils Tower has a remarkably symmetrical, cylindrical shape, it sways with almost equal ease in all directions.

Specifically, the data showed:

Mode 1 (1.1 Hz): Bending oriented primarily along an East-West axis.
Mode 2 (1.2 Hz): Bending oriented primarily along a North-South axis.

This minor difference of 0.1 Hz is a result of the tower's slight deviation from a perfect circle. The summit of the tower is slightly elongated, measuring roughly 180 feet (55 meters) from east to west and 300 feet (91 meters) from north to south. This structural elongation provides slightly more stiffness along the north-south axis, pushing its resonance frequency up to 1.2 Hz.

The Torsional Mode (2.1 Hz)

The most surprising discovery of the study was the third mode, which registered at 2.1 Hz. At this frequency, the tower does not sway back and forth; instead, it undergoes torsional rotation.

This means that the massive, 265-meter-high column of rock actually twists clockwise on its vertical axis, then untwists and rotates counterclockwise, repeating this motion more than twice every second.

"That’s a rather interesting one, but again, something that’s relatively common for tall buildings," Moore noted. While torsional rotation is a known physical phenomenon in highly engineered skyscrapers, finding it so cleanly expressed in a natural, monolithic rock formation is incredibly rare and highlights the unique, free-standing structural geometry of Devils Tower.

The "Compliance of Joints": Why the Tower is "Softer" than Expected

While the discovery of these frequencies was scientifically satisfying, it set off a major intellectual puzzle for the geologists. To verify their field measurements, the researchers created a highly detailed, three-dimensional digital model of Devils Tower using advanced photogrammetric mapping and a finite-element physics engine (COMSOL Multiphysics).

  ============================================================
             Young's Modulus (Stiffness) Comparison
  ============================================================
  Intact Phonolite Porphyry (Lab Test):       56 GPa
  ------------------------------------------------------------
  Calibrated Global Tower Model:               8 GPa
  ============================================================
  Result: Columnar joints make the tower 7 times more flexible!

To run the model, they had to input two primary values: the density of the rock (phonolite porphyry has a density of roughly 2600 kg/m³) and its Young’s modulus (a measure of a material's elastic stiffness, or how much it stretches or compresses under stress).

If you take a small, solid core sample of phonolite porphyry into a mechanical laboratory and subject it to crushing forces, it exhibits a Young’s modulus of approximately 56 GPa (gigapascals). It is an incredibly stiff, unforgiving, and strong volcanic rock.

However, when the geologists plugged 56 GPa into their 3D structural model of Devils Tower, the math failed spectacularly. The computer predicted that a solid, 56 GPa monolith of that shape and size should have resonant frequencies much higher than the 1.1 Hz and 1.2 Hz measured in the field.

To make the computer model match the real-world physical vibrations recorded on the summit, the team had to dial down the global Young’s modulus of the tower to just 8 GPa—a value seven times lower than the laboratory rock samples!

The Secret of the Hexagonal Columns

Why is the actual Devils Tower seven times "softer" and more flexible than a solid block of its own rock? The answer lies in its most famous visual characteristic: its spectacular columnar jointing.

Devils Tower is not a single, continuous block of solid stone. Instead, it is a tightly packed bundle of thousands of vertical, polygonal columns. These columns, measuring up to 8 feet in width and soaring hundreds of feet into the air, are separated by vertical joints, fractures, and tiny cracks that formed when the magma cooled and contracted 40.5 million years ago.

      [ Solid Rock Core ]                [ Columnar Jointing ]
         (Lab Tested)                     (Real-World Tower)
         
          __________                          _   _   _   _
         |          |                        | | | | | | | |
         |  56 GPa  |                        | | | | | | | |
         | (Rigid)  |                        | | | | | | | |
         |__________|                        |_| |_| |_| |_|
                                            <- Joint Compliance ->
                                              Global: 8 GPa
                                            (Flexible/Resilient)

In structural geology, this is known as joint compliance. While each individual column is composed of incredibly rigid, 56 GPa rock, the millions of microscopic spaces, air gaps, and fracture planes between the columns act as a series of tiny, distributed mechanical springs.

When the wind hits the tower, or when a seismic wave passes through its base, these vertical column joints allow for minor, elastic "give." This cumulative, system-wide flexibility lowers the global stiffness of the structure to 8 GPa, allowing the tower to bend, sway, and absorb energy without breaking.

This is a vital revelation for long-term geological conservation. The columnar joints are not weaknesses that threaten to bring the tower crashing down; instead, they form a highly advanced, natural structural damping system. By allowing the tower to dissipate energy through microscopic flexing, the joints protect the columns from the catastrophic, brittle snapping that would occur if the entire monolith were a single, rigid, brittle block.

The Deep History: How Mato Tipila Formed 40.5 Million Years Ago

To truly appreciate why this flexible colossus is vibrating today, we must look back to its violent birth. The geologic origin of Devils Tower is a story of subterranean magma, immense pressures, and millions of years of patient erosion.

During the Eocene Epoch, approximately 40.5 million years ago, the Rocky Mountains and the Black Hills of Wyoming were undergoing a massive tectonic uplift. Deep beneath the Earth's surface, molten rock (magma) rich in silica and low in quartz rose through the crust, forcing its way through existing sedimentary layers of sandstone, shale, and gypsum that had been deposited by ancient Mesozoic seas.

  =====================================================================
                    Geologic Stratigraphy of the Area
  =====================================================================
   Sundance Formation (Hulett Sandstone)       Yellow sandstone cliffs
  ---------------------------------------------------------------------
   Gypsum Springs Formation                    White gypsum bands
  ---------------------------------------------------------------------
   Spearfish Formation                         Dark red sandstone/shale
  =====================================================================

For over a century, geologists have debated the exact shape of this intrusion. The three main competing theories include:

1. The Volcanic Neck (Plug) Theory

This classical theory suggests that Devils Tower is the solidified, plumbing neck of an ancient, long-extinct volcano. According to this model, a volcano erupted here 40 million years ago, and when the eruption ceased, the magma remaining in the vertical conduit cooled and solidified into hard phonolite. Over millions of years, the soft volcanic cone on the outside was completely eroded away, leaving only the ultra-hard inner volcanic plug standing.

2. The Laccolith Theory

Proposed in 1907 by geologists Nelson Horatio Darton and C.C. O’Harra, this theory suggests that Devils Tower was never an active, erupting volcano. Instead, it was a laccolith—a dome-shaped, subterranean intrusion of magma that squeezed between horizontal sedimentary rock layers like a giant mushroom, bulging the earth upward but cooling entirely beneath the surface.

3. The Lava Coulee / Maar-Diatreme Theory

A more modern hypothesis, put forward by geologists Závada et al. in 2015, suggests that Devils Tower is the remnant of a lava coulee (a highly viscous, thick dome of lava) that was emplaced inside a maar-diatreme volcano. In this scenario, a violent phreatomagmatic eruption (magma interacting with groundwater) blew out a deep crater, which was then filled by a slow-oozing dome of thick phonolite lava that cooled in place.

How the Famous Columns Formed

Regardless of the exact shape of the original intrusion, all geologists agree on how the breathtaking columns were created.

As the molten phonolite magma sat trapped beneath the earth, it began to cool slowly and uniformly. As rock transitions from a liquid state to a solid crystalline state, it contracts in volume. This contraction set up intense, horizontal pulling forces throughout the cooling mass.

To relieve these stresses, the rock began to crack. Because the cooling was incredibly uniform, the cracks formed in a highly organized, geometric pattern. The physics of contraction dictate that a cooling, homogeneous mass will split along triple-junction points at 120-degree angles, which naturally generates perfect hexagons.

                       (120° Triple Junction)
                                \   /
                                 \ /
                              ----*----
                                 / \
                                /   \
                        Hexagonal Contraction

These cracks started at the outer, cooler edges of the intrusion and slowly propagated inward, perpendicular to the cooling front. The result was a massive, tightly bound bundle of vertical columns, matching the geometry we see today.

Over the next 40 million years, water, ice, and the Belle Fourche River patiently stripped away thousands of vertical feet of soft sedimentary sandstones and shales. Because phonolite porphyry is packed with hard feldspar crystals, it resisted this erosion, slowly emerging from the landscape like a giant, stone sentinel.

A Convergence of Science and Indigenous Sacred Geography

The scientific discovery that Devils Tower is in a state of constant, rhythmic vibration has had a profound impact far beyond the halls of university geology departments. For the Native American tribes of the Northern Plains, the findings represent a striking, physical confirmation of a worldview they have held for thousands of years: that the Earth and its grandest landforms are living, breathing, and dynamic beings.

  ====================================================================
               Indigenous Names for Mato Tipila (Bear Lodge)
  ====================================================================
   Lakota:       Matȟó Thípila (Bear Tipi or Bear Lodge)
   Kiowa:        Aloft on a Rock (Tso-ai)
   Cheyenne:     Na Kovehe (Bear Lodge)
   Crow:         Daxpitchee Gaaawishe (Home of the Bears)
  ====================================================================

According to traditional Kiowa and Lakota oral histories, the tower’s unique vertical columns were created when several young girls went out to play and were chased by a band of giant, ferocious bears. To save the girls, the Great Spirit caused the ground beneath them to rise rapidly into the heavens. The desperate bears clawed frantically at the sides of the rising mountain, leaving the deep, vertical scratch marks that we now recognize as the columnar joints of the phonolite porphyry.

For many indigenous elders, the concept that Mato Tipila "hums" and "moves" is not a novel discovery. It is a validation of the animate nature of the landscape.

The physical movement of the tower, swaying once per second like a heartbeat, bridges a long-standing conceptual gap:

Western Science historically viewed the tower as an inert, dead rock monument, slowly eroding over geologic epochs.
Indigenous Tradition has always treated the tower as an active, spiritually alive participant in the local ecosystem, demanding respect, quiet, and prayer.

This cultural convergence has added a new layer of complexity to the ongoing debates surrounding how the monument is managed. Devils Tower is one of the premier crack-climbing destinations in North America, with hundreds of climbers scaling its sheer faces every week. However, the National Park Service has long instituted a voluntary climbing ban during the month of June to respect the sacred ceremonies, vision quests, and sun dances held by tribes at the base of the tower.

The revelation that the tower is actively vibrating and reacting to every environmental shift has provided climbers and conservationists alike with a renewed sense of stewardship. "We hope that by bringing the tower to life we help people experience it in a new way," said lead researcher Jeffrey Moore. "Showing that it’s not just a static rock landform, but that it’s dynamic, lively, and constantly moving".

From Internet Hoaxes to Heavy Science: Debunking the "Giant Tree Root" Myth

The 2026 GSA study also serves as a scientific corrective to one of the most persistent internet hoaxes of the modern era.

In 2017, a satirical Facebook page called "Casper Planet" posted a photoshopped image and a fake news article claiming that the Wyoming State Parks Department had conducted "photographic seismic readings" below Devils Tower and discovered a massive, petrified root system stretching 4 miles deep and 7 miles wide. The post claimed that this "discovery" proved Devils Tower was actually the stump of a giant, ancient tree.

  ==================================================================
              Internet Myth vs. Actual Subsurface Science
  ==================================================================
   Satirical Myth:      "Giant petrified tree roots 4 miles deep"
  ------------------------------------------------------------------
   Actual Geology:      A subterranean volcanic stock/neck that cools
                        into phonolite porphyry columns.
  ==================================================================

Despite the fact that Wyoming State Parks immediately flagged the post as satire (and pointing out that Devils Tower is managed by the federal National Park Service, not the state), the "giant tree" theory went viral. It was widely shared across alternative history forums, flat-earth communities, and social media platforms, with many claiming that mainstream science was "hiding the truth" about the tower's organic origins.

The ironies of the "giant tree" hoax are deep:

The Satire's Core Claim: The fake post claimed that scientists used "seismic readings" to find organic, tree-like structures.
The Scientific Reality: When real scientists actually placed seismometers on the tower, they didn't find fossilized wood or giant roots; they found that the tower behaves exactly like a massive, elastic column of volcanic rock, governed by the precise laws of structural engineering and crystalline mechanics.

The actual structural data—the 1.1 Hz and 1.2 Hz bending frequencies, the 2.1 Hz torsional twisting, and the global Young's modulus of 8 GPa—is far more spectacular than any internet hoax. It shows that while Devils Tower is not a biological tree, it has an organic-like structural complexity, using its columnar joints to "bend like a tree in the wind" to survive.

How Devils Tower Compares to Other "Vibrating" Monuments

The study of Devils Tower is part of a broader, decade-long effort by Jeffrey Moore's lab at the University of Utah to map the structural dynamics of famous geological landforms across the globe.

By comparing the resonant frequencies of different rock formations, geologists have begun to compile a comprehensive "tempo of the wild," showing that almost every freestanding rock structure has a unique, identifiable heartbeat.

  =====================================================================
            Resonant Frequencies of Key Geological Structures
  =====================================================================
   Structure          Height/Span   Fundamental Frequency   Rock Type
  =====================================================================
   Castleton Tower     120 meters     0.8 Hz to 1.0 Hz      Sandstone
   Devils Tower        265 meters     1.1 Hz to 1.2 Hz      Phonolite
   Mesa Arch           27 meters      ~20 Hz                Sandstone
   The Matterhorn      4,478 meters   0.42 Hz               Gneiss/Schist
  =====================================================================

Castleton Tower, Utah

In 2018, Moore's team climbed Castleton Tower, a stunning 400-foot-tall Wingate sandstone spire near Moab, Utah, to install a summit seismometer. They found that Castleton vibrates at fundamental frequencies of 0.8 Hz and 1.0 Hz.

Because it is composed of porous sandstone and lacks the highly organized columnar jointing of Devils Tower, Castleton acts as a highly rigid, uniform cantilever, flexing its entire height once every second.

Natural Sandstone Arches

The team has also monitored dozens of natural arches, including Utah's famous Delicate Arch and Rainbow Bridge. Unlike vertical towers, which bend back and forth, arches act as massive structural bridges, vibrating in complex "bridge-deck" modes with frequencies typically ranging from 5 Hz to 30 Hz depending on their span and thickness.

These studies have shown that human activities, such as low-flying helicopters, nearby highway traffic, and even heavy footsteps, can excite these resonance frequencies, potentially accelerating the propagation of internal fractures.

The Matterhorn, Switzerland

On an entirely different scale, Moore and an international team of scientists climbed the legendary Matterhorn in the Swiss Alps to measure its vibrations. They discovered that this massive mountain resonates at a very low frequency of 0.42 Hz (about once every 2.4 seconds).

The entire mountain sways back and forth, acting as a giant, alpine tuning fork excited by the constant, deep-seated microseismic movements of the European tectonic plate.

The Broader Horizon: Structural Health Monitoring and the Future of Geological Conservation

As we look toward the future, the implications of this breakthrough research stretch far beyond academic curiosity. The methods pioneered by Moore, Vollinger, and Burjánek are rapidly becoming essential tools for the conservation of cultural heritage sites and the mitigation of geologic hazards.

                  [ Ambient Vibration Inputs ]
                 (Wind, Microseisms, Traffic)
                             |
                             v
                 [ Seismometer Array Data ]
                             |
                             v
                 [ Structural Health Model ]
               (Identifies shift in frequencies)
                             |
                             +---> [ Safe / Unchanged ] -> Continue Monitoring
                             |
                             +---> [ Sudden Frequency Drop ] -> WARNING:
                                                                 Fracture Growth /
                                                                 Imminent Rockfall!

1. Predicting Catastrophic Rockfalls

While Devils Tower appears stable, it is under constant attack from the elements. Rain, snow, and freeze-thaw cycles force water deep into the cracks between the columns.

When this water freezes, it expands, pushing the columns apart in a process known as frost-wedging. Although no massive, full-column collapses have occurred in recorded human history, the massive "scree field" of broken, bus-sized boulders surrounding the tower's base stands as quiet proof that the monument was once much wider than it is today.

By establishing a precise baseline of Devils Tower's natural resonant frequencies (1.1 Hz, 1.2 Hz, and 2.1 Hz), scientists can now use the tower's vibrations to monitor its internal structural health. If a major column begins to separate from the main body of the tower, the structural stiffness of the system will drop. This drop in stiffness will cause a measurable, downward shift in the tower’s resonant frequencies.

In the future, a permanent, real-time seismic monitoring system on the tower could serve as an early warning system, detecting the propagation of internal fractures and predicting major, co-seismic rockfalls before they occur, potentially saving lives in the tourist areas below.

2. Assessing Earthquake Hazards

Wyoming is not typically thought of as an earthquake hotspot, but it is bordered by active tectonic zones, including the Intermountain Seismic Belt and the Yellowstone supervolcano caldera. If a major earthquake were to strike the region, how would Devils Tower behave?

The 3D numerical models calibrated during the 2026 study provide engineers and geologists with a highly accurate tool to simulate exactly how the tower would deform under intense seismic shaking. Because they now know the tower's true global stiffness (8 GPa) and how its columns interact, researchers can run highly accurate simulations of different earthquake scenarios. These models show that the tower’s unique, joint-induced flexibility makes it remarkably stable, allowing it to survive ground accelerations that would easily topple a rigid, unjointed monument of similar height.

3. Civil Engineering and Skyscraper Design

Humans are building taller, more slender structures than ever before. From the ultra-tall "pencil towers" of New York City’s Billionaires’ Row to the soaring skyscrapers of Dubai and Shenzhen, structural engineers are constantly searching for ways to design tall buildings that can safely sway in high winds without causing structural damage or occupant motion sickness.

Devils Tower is a natural, 40-million-year-old experiment in tall-building design. By studying how its vertical, columnar joints act as natural dampers and energy dissipators, civil engineers can learn valuable lessons about "biomimetic" structural design.

The concept of integrating controlled, energy-dissipating joints or "compliant zones" into tall concrete or steel structures—rather than building them to be perfectly rigid—could lead to safer, more resilient high-rises that mimic the natural, ancient engineering of Mato Tipila.

What to Watch for Next

The publication of the 2026 paper is not the end of the story, but rather the opening chapter of a new era of dynamic geological monitoring. As we look forward, several key milestones and unresolved questions remain:

Seasonal Thermal Frequency Drifts: Geologists are eager to study how the tower’s frequencies change between the freezing Wyoming winters and the hot summer months. In other rock formations, thermal expansion causes cracks to close in summer, temporarily increasing the rock’s global stiffness and raising its resonant frequencies. Continuous monitoring of Devils Tower could show whether its jointed columns undergo a similar seasonal "breathing" cycle.
The Impact of Climbing Traffic: While climbing is permitted on the tower, some researchers are interested in setting up sensitive geophones to measure whether the physical placement of climbing cams, ropes, and the weight of climbers has any measurable impact on the localized high-frequency vibrations of individual columns.
Global Structural Health Mapping: With the success of the Devils Tower and Castleton Tower studies, geologists are already looking to apply ambient vibration modal analysis to other iconic, threatened rock formations across the globe. From the delicate sea stacks of Twelve Apostles in Australia to the gravity-defying precariously balanced rocks of California, we are on the verge of mapping the natural physical pulse of the world’s most beloved landscapes.

For over a century, Devils Tower has stood as a symbol of rugged, unyielding permanence in the American West. Thanks to a brilliant team of geologists, a brave summit climb, and a sensitive seismometer, we now know that its true beauty is not in its static rigidity, but in its constant, elastic, and vital connection to the vibrating pulse of the Earth.