The Great Pyramid of Giza has survived for more than 4,600 years, outlasting empires, invasions and natural disasters. Now, researchers believe they have identified one of the key reasons why the ancient structure has endured for so long.
A new study published in the journal Scientific Reports found that the pyramid’s design allows it to absorb and distribute seismic energy with surprising efficiency. The research focused on the structural behaviour of the monument during low-level vibrations caused by both natural activity and human movement.
Located on the Giza plateau near Cairo, the Great Pyramid was built as the tomb of the pharaoh Khufu during Egypt’s Old Kingdom period. It remains one of the most recognisable structures ever created and was the tallest man-made building in the world for nearly 3,800 years.
Researchers used seismometers to record ambient vibrations at 37 different points in and around the pyramid. These tiny movements, constantly generated by wind, traffic and natural ground motion, allowed scientists to study how the structure responds to stress.
Despite its enormous size and complex internal layout, the pyramid showed what researchers described as a highly stable and uniform structural response.
Each side of the pyramid measures around 230 metres at the base, covering roughly 13 acres. Originally standing at about 147 metres tall, the monument has gradually lost height through erosion and the removal of its outer casing stones centuries ago. It now stands at approximately 138.5 metres.
The study identified several factors that contribute to the pyramid’s resilience. These include its massive base, low centre of gravity, symmetrical shape and the gradual reduction of weight towards the top. Researchers also pointed to the sophisticated internal chamber system and the strong limestone bedrock beneath the structure.
“These elements together create a well-balanced, coherent structure,” said seismologist Mohamed ElGabry from Egypt’s National Research Institute of Astronomy and Geophysics.
The findings suggest that ancient Egyptian builders had a sophisticated understanding of structural stability, even if they did not possess modern engineering theory.
“Ancient Egyptian builders clearly possessed practical knowledge related to stability, foundation behaviour, mass distribution and load transfer,” said Asem Salama, a senior researcher involved in the project.
Salama stopped short of claiming that the pyramid was deliberately engineered to resist earthquakes in the modern sense. However, he said the builders developed architectural solutions that naturally produced extraordinary long-term durability.
“So while I would hesitate to claim that they intentionally designed the pyramid specifically for earthquake resistance, I do think they developed architectural and geotechnical solutions that naturally produced structures with exceptional long-term resilience,” he said.
Researchers believe much of this knowledge came through experience and experimentation. Earlier pyramids built before Khufu’s monument revealed flaws and structural weaknesses, suggesting Egyptian engineers refined their techniques over time.
One of the study’s most striking discoveries involved the five chambers located above the King’s Chamber, the pyramid’s primary burial room.
Scientists found that vibration amplification generally increased higher up inside the pyramid, which is typical in tall structures. Yet those five upper chambers showed a noticeable reduction in vibration levels despite their elevated position.
“This suggests these chambers effectively help dissipate seismic energy and protect the King’s Chamber - one of the most critical areas - from excessive shaking,” ElGabry explained.
Researchers gathered seismic data from internal passageways, chambers and surrounding rock and soil to better understand how the entire structure behaves during ground movement.
The findings help explain why the Great Pyramid has suffered relatively little damage despite major earthquakes striking the region over the centuries.
Two of the most significant earthquakes in modern Egyptian history occurred in 1847 and 1992. Both caused widespread destruction across Cairo and surrounding areas. The 1992 earthquake killed more than 560 people and damaged thousands of buildings.
The Great Pyramid, however, experienced only limited damage.
The monument forms part of the wider Giza complex, alongside other pyramids and the Great Sphinx, attracting visitors from around the world for thousands of years.
For ElGabry, the pyramid’s endurance is about more than engineering alone.
“The Great Pyramid is not only an extraordinary engineering achievement but also a profound work of art and human vision,” he said. “Its perfect symmetry, monumental scale and elegant proportions create a timeless beauty that continues to inspire awe even after 4,600 years.”
He also praised the organisational scale behind its construction, which is believed to have taken around two decades and required the coordination of tens of thousands of workers, engineers and administrators.
According to ElGabry, the project demanded careful management of labour, food supplies, training and the transport of vast quantities of stone.
“It reminds us what human civilisation is capable of when vision, science, organisation and determination come together,” he said.
Salama summed up the achievement more simply. “They really did build ‘one for the ages’.”
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