The Great Pyramid of Giza, built 4,600 years ago, has lost only ~10 meters of height. Geoscientists placed 37 vibration sensors and discovered the pyramid oscillates at 2-2.6 Hz while the ground moves at ~0.6 Hz. That gap, plus its massive base and relief chambers, helps it withstand earthquakes.
Seismic study reveals how the The Great Pyramid of Giza resists earthquake damage
EgyptTechnology
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Key facts
- The 4,600-year-old Great Pyramid of King Khufu has lost only about 10 m (33 ft) of height since construction, mainly due to stone removal for medieval Cairo
- Geoscientists placed 37 vibration sensors in and around the pyramid during periods with no tourists
- Internal pyramid vibrations ranged from 2 to 2.6 Hz, significantly different from ground vibrations of ~0.6 Hz
- This frequency gap causes the pyramid to sit apart from ground vibrations during earthquakes
- Pressure-relieving chambers above the King's Chamber dampen vibrations traveling toward the apex
- The pyramid's massive base, limestone foundation, and symmetrical geometry contribute to stability
- Earlier pyramids (e.g., the collapsed one at Meidum) show the architects experimented with slope geometry and internal layouts before perfecting the design at Giza
Sources
The Great Pyramid of Giza: Ancient Engineering Marvel & Celestial ...egypttoursportal.com
It has a height of 146.6 m (481 ft) or 280 cubits originally and 138.5 m (454 ft) contemporary on a base of 230.3 m (756 ft) long. The Volume of ...
Great Pyramid of Giza - Wikipediaen.wikipedia.org
Over time, most of the smooth white limestone casing was removed, which lowered the pyramid's height to the current 138.5 metres (454.4 ft); what is seen today ...
About how tall is the pyramid of Khufu at Giza? - EgyptTravelBlog.comegypttravelblog.com
The Pyramid of Khufu at Giza (also known as THE Great Pyramid) was initially built to a height of 280 royal cubits (an ancient Egyptian measurement)
Great Pyramid of Giza's Design Naturally Shields It from ... - Sci.Newssci.news
Its current height of 137 m reflects the loss of the original smooth limestone casing over the centuries. Since its construction, the ancient ...
Great Pyramid | History | Research Starters - EBSCOebsco.com
Rising at an incline of 51°52′, the sides originally reached a height of 482 feet (147 meters), but the top 31 feet (9 meters) are now lost. The total area ...
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