At least 18 climbers were killed. Some geologists said the earthquake may have caused Everest's snow cap to shrink. Scientists had found that some other Himalayan peaks such as Langtang Himal, mostly to the north of Kathmandu and close to the epicentre, had reduced in height by approximately a metre after the earthquake. Others have argued that Mount Everest, like other Himalayan peaks, may have actually grown over time because of the shifting tectonic plates it sits on.
But experts say major earthquakes can result in that process being reversed. The heights of mountains are measured with the mean sea level as the base. So it's less about working out the where the top is, than where the bottom would be.
Nepal used the Bay of Bengal as its sea level, but India had already surveyed a point closer to Everest, near the India-Nepal border, from the bay, and was able to provide the Nepalese surveyors with the height at that point. From there, Nepal built a network of line-of-sight stations stretching nearly km miles to the point Everest first become visible, creating a chain of points it could measure and add together. The Chinese surveyors, according to the state-run China Daily, used the Yellow Sea in the eastern province of Shandong as their sea-level base.
Surveyors from both sides also used trigonometry formulas to calculate the height of the summit. The formulas they used calculate the height of a triangle by multiplying its base with its angles.
But for all the clever ground work, someone still needs to be on top of the mountain. The Nepalese surveyors went up to the summit last year, while the Chinese surveyors went up in May, becoming the only team to reach the top in , after Nepal suspended all expeditions during the coronavirus pandemic and China banned foreign travellers.
Nepalese officials said they used 12 different lower peaks looking up at the Everest summit for their trigonometry calculations, to achieve a more precise result.
Chinese media reported that Chinese surveyors used the same method. Both sides also used Global Navigation Satellite Systems to receive elevation data from numerous receivers in their calculations.
China has previously conducted two height measurements of Mount Everest - first in and then in Members of the second survey team installed a Chinese version of a GPS device on the summit, according to the Himalayan Database. Nepalese surveyors used GPS to make their calculations. Search Query Show Search. Show Search Search Query. Play Live Radio.
Next Up:. Available On Air Stations. All Streams. Facebook Twitter LinkedIn Email. Second, the world community and those in adventure tourism will be able to gain a higher record by climbing Mt Everest that is taller than it was assumed yesterday. Click here to join our channel indianexpress and stay updated with the latest headlines. Yubaraj Ghimire Home Explained Explained: How Mount Everest got 3 feet higher, endorsed by both Nepal and China Explained: How Mount Everest got 3 feet higher, endorsed by both Nepal and China The common declaration by Nepal and China meant the two countries have shed their long-standing difference in opinion about the height of Mount Everest.
How and when was the earlier measurement of 8, m done? Also in Explained Survey of India officials explain how the original height was calculated.
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