Ocean Rhythms Have Deep Roots

Deep-Earth oscillations reveal finely
balanced forces consistent with
sophisticated planetary engineering

What Deep Core Oscillations
Reveal About Earth’s Design

by Dr. Sarah Buckland-Reynolds

Have you ever paused to think about how much of life depends on timing? Our hearts beat rhythmically. The tides rise and fall. Seasons cycle with remarkable regularity. Even our sleep patterns follow biological clocks. We often take these rhythms for granted, yet they reveal a world filled with coordinated oscillations operating across vastly different scales.

Many people also assume that Earth’s 24-hour day is fixed. However, while it has been known for over two centuries that there are slight variations from the ’24-hour’ estimate, the precise factors leading to these variations have not been clear. However, a recent paper in Nature brought deep oscillations to light as a factor.

Gravitational torque drives multidecadal variations in length of day (Zhang and Dumberry, Nature, 23 September 2026) has provided novel insights, pointing to a source that many may not have thought of oscillations deep beneath our feet into the deep core of the Earth. This article reflects on these findings and the potential engineering insights that these may point to occurring deep within earth’s surface.

Earth’s Hidden Rhythms

The new Nature study by Huifeng Zhang and Mathieu Dumberry proposes that multidecadal changes in the length of Earth’s Day are driven primarily by gravitational interactions between Earth’s inner core and mantle. The researchers found that oscillations lasting roughly 60-70 years appear to exchange angular momentum between Earth’s deepest layers, slightly speeding up or slowing down the planet’s rotation.

Their work suggests that a gravitational torque generated by the inner core may be the primary driver of these variations, while electromagnetic and topographic forces act mainly as resisting influences.

The findings indicate that Earth may be far more dynamic and interconnected than previously appreciated. They also raise important questions about whether such exquisite coordination is best explained as the product of unguided processes or as evidence of purposeful engineering.

A Planet That Breathes in Rhythms

One of the most fascinating discoveries of modern science is that, similar to fractals, oscillations appear everywhere. From the scale of atoms that vibrate, to the resonance of molecules, and even rhythmic signals that cells use to communicate, to larger scale processes such as the pulsation of our heart, waves produced by our brains, and tides and oscillations in the oceans, there seems to be an underlying feature that unifies our created earth.

According to Zhang and Dumberry, these oscillations are also present deep within the Earth’s inner core in a broad cycle lasting approximately 70 years. As the inner core’s rotational behavior changes, it generates a gravitational torque that subtly influences the mantle and therefore affects the planet’s rotation rate. The result is a measurable change in the length of day by a few milliseconds.

Why is This Significant? The Core is More Dynamic Than Thought

One reason this finding was significant is that it sheds light on the potential structure of the inner core, with the interior being more dynamic than expected. In exploring this more deeply, the authors in their paper infer what Earth’s deep interior must be like for the observed oscillations to occur. In their words, they state:

“… Our reconstructed torque histories, although tied to the accuracy of the inner core rotation and core flow models, support a lowermost mantle that features near-neutrally buoyant thermochemical piles…, a post-perovskite (pPv) phase with a low viscosity… and a highly conducting… iron-enriched layer a few kilometres thick at its base…. Our results also suggest a low-viscosity inner core deforming in only a few years… and yield an upper limit on the stratification at the top of the fluid core.”

In simplified terms, this means that the authors’ inferred reconstruction of the core processes include the following:

• The inner core slowly shifting relative to the mantle.
• The inner core not being perfectly spherical, producing a gravitational pull (torque) on the mantle. That gravitational torque tends to speed up or slow down the mantle’s rotation.
• Opposing forces at the core-mantle boundary resist this motion, including electromagnetic forces produced by Earth’s magnetic field, and topographic forces produced by irregularities at the core-mantle boundary.

In engineering terms, this dynamic is similar to a spring-and-damper system, where gravitational torque is the driving force, and electromagnetic/topographic torques are the braking force. The result is a stable oscillation rather than runaway instability.

In addition to this, another surprising part of the authors’ findings was the the low-viscosity inner core that they found deformed “…in only a few years.” This challenges traditional ideas as the inner core is often depicted in textbooks as a rigid iron sphere. Instead, the authors conclude that the inner core is more complex than just a solid iron ball but may deform relatively easily and rapidly. Their preferred models suggest relaxation times of only about 2-31 years. That is surprisingly dynamic for something at the centre of the Earth.

Equally intriguing is the apparent sensitivity of the interactions between core topography and planetary processes thousands of kilometres away. Specifically, Zhang and Dumberry indicate that very small shifts in shape and alignment of structures only 11-29 metres high within regions thousands of kilometres across may influence Earth’s rotational behaviour, with sufficient force to account for observed day-length variations.

These findings add to a broader pattern in Earth science: as observations improve, researchers often uncover greater complexity and interconnectedness among Earth system processes than previously recognized. In the case of the core, the observed behavior appears to involve interactions among several mechanisms, including gravitational and electromagnetic torques, mantle heterogeneity, electrically conductive regions near the core-mantle boundary, dynamic deformation within the core, and exchanges of angular momentum among Earth’s internal layers.

Such precision naturally raises questions.

• How did a system requiring such delicate balancing arise?
• Why should multiple layers, each possessing different physical properties, interact in ways that maintain long-term rotational stability?

More on Oscillations and Engineering

Intriguingly similar to processes in nature, engineers routinely design systems around oscillations. Items such as pendulum clocks use oscillations for timekeeping, electronic circuits rely on oscillators for communication, mechanical systems often include feedback mechanisms that prevent instability, and even aircraft employs numerous control systems that balance competing forces. Zhang and Dumberry’s research inferred a similar balancing relationship occurs in the deep core. From a design perspective, such coordinated feedback mechanisms are exactly what engineers create to maintain stability.

The potential positive impacts of an oscillating system in the earth’s core encompass many other connected systems, as the earth’s rotational speed directly affects climate patterns, atmospheric circulation, ocean circulation, and biological rhythms. Without an internally balanced system, large uncontrolled variations in rotation could have significant consequences for life. However, Zhang and Dumberry (2026)’s research showed that despite variations that exist, the oscillatory processes balanced the angular momentum leading to the stability upon which our planet relies.

Another implication of the oscillatory system implied by Zhang and Dumberry’s (2026) study is how integrated the system appears to be, relying on interactions among multiple parts. Feedback regulation from the torques balancing each other, also represents a hallmark of many engineered systems. The fine-tuned properties that are required for the model to work was also apparent, as it depends on specific viscosities, conductivities, and mantle structures. The more conditions needed simultaneously, the more questions arise about how such a system originated. This highlights a recurring issue in strictly materialistic explanations.

Challenges for Geological Evolutionary Assumptions

The findings raise broader questions about naturalistic assumptions regarding Earth’s history.

Uniformitarian frameworks often emphasize long-term self-organization through unguided processes. Yet this study repeatedly uncovers evidence of remarkable fine-tuning of precisely balanced torques, highly coordinated angular momentum exchanges, long-term oscillatory behaviour, dynamic feedback systems, gravitational interactions requiring specific geometries, and intricate coupling among multiple planetary layers.

With all these components required to achieve balance, key question emerges including:

• How did numerous interacting components arrive at a state where opposing forces remain balanced?
• Why should matter arrange itself into systems capable of such coordinated behavior in the first place?

A Scriptural Reflection

Zhang and Dumberry’s (2026) research uncovers yet another example of the complex, highly integrated system of interacting components operating under the surface of the earth that impacts movements at a planetary scale. The balanced dynamic of this system is reasonable evidence to infer order and design.

As Christians, this should not be surprising, as the Bible repeatedly presents creation as an orderly system upheld by God’s wisdom and power. For example, Jeremiah 33:25 speaks of God’s “ordinances of heaven and earth.” Studies such as this remind us that creation contains layers of order that remain hidden from human observation.

The deeper that scientists probe, the more they discover remarkable connections among systems that once seemed unrelated. As we can expect to be the case, scientific investigation continues to reveal an Earth that appears exquisitely organized from surface to core. Deep beneath our feet, rhythmic oscillations silently help govern the length of our days, offering yet another glimpse into the astonishing complexity of the planet we call home.

Dr. Sarah Buckland-Reynolds is a Christian, Jamaican, Environmental Science researcher, and journal associate editor. She holds the degree of Doctor of Philosophy in Geography from the University of the West Indies (UWI), Mona with high commendation, and a postgraduate specialization in Geomatics at the Universidad del Valle, Cali, Colombia. The quality of her research activity in Environmental Science has been recognized by various awards including the 2024 Editor’s Award from the American Meteorological Society for her reviewing service in the Weather, Climate and Society Journal, the 2023 L’Oreal/UNESCO Women in Science Caribbean Award, the 2023 ICETEX International Experts Exchange Award for study in Colombia. and with her PhD research in drought management also being shortlisted in the top 10 globally for the 2023 Allianz Climate Risk Award by Munich Re Insurance, Germany. Motivated by her faith in God and zeal to positively influence society, Dr. Buckland-Reynolds is also the founder and Principal Director of Chosen to G.L.O.W. Ministries, a Jamaican charitable organization which seeks to amplify the Christian voice in the public sphere and equip more youths to know how to defend their faith.