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India to measure whether Everest shrank in Nepal quake India says it plans to measure whether quake shrank Everest
(about 3 hours later)
The Indian government has announced it will measure the height of Mount Everest for the second time to assess whether it changed as a result of the 2015 Nepal earthquake. The Indian government has said it plans to measure the height of Mount Everest for a second time to assess whether it changed as a result of the 2015 Nepal earthquake.
Surveyor-General Swarna Subba Rao said an expedition would be sent to the world's highest mountain in two months.Surveyor-General Swarna Subba Rao said an expedition would be sent to the world's highest mountain in two months.
Nepalese officials, however, told the BBC that no agreement had been reached on allowing an Indian team access.
Satellite data has indicated the quake impact reduced the height of the peak.Satellite data has indicated the quake impact reduced the height of the peak.
The most widely recognised height, 8,848m (29,028ft), came from an Indian survey 62 years ago.The most widely recognised height, 8,848m (29,028ft), came from an Indian survey 62 years ago.
Scientists have said that the height of a swathe of the Himalayas dropped by around one metre shortly after the 7.8 magnitude Nepal earthquake.Scientists have said that the height of a swathe of the Himalayas dropped by around one metre shortly after the 7.8 magnitude Nepal earthquake.
Satellites dissect Nepal quakeSatellites dissect Nepal quake
Himalayan 'drop after Nepal quake'Himalayan 'drop after Nepal quake'
They added at the time that a ground survey and GPS or an airborne mission would be needed to determine whether the world's highest peak had seen a change in its height by a few centimetres.They added at the time that a ground survey and GPS or an airborne mission would be needed to determine whether the world's highest peak had seen a change in its height by a few centimetres.
Mr Rao told the BBC: "The Survey of India will work with the government of Nepal, which has agreed in principle to collaborate." Mr Rao told the BBC that India's central mapping agency, the Survey of India, would "work with the government of Nepal, which has agreed in principle to collaborate" with the measuring efforts.
Everest's height will be assessed using a combination of GPS measurement and triangulation. But Ganesh Bhatta, Nepal's survey department deputy chief, later told the BBC that there was no agreement with India, adding that Nepal was in fact planning its own survey.
Mr Rao said it was an open question whether the quake had affected Everest's height. A combination of GPS measurement and triangulation is required to measure the exact height of the mountain.
"We don't know what happened, there's been no confirmed report. Some scientists do believe it has shrunk. But there's a school of thought it may have grown." Mr Rao said it was still unclear whether the earthquake had affected Everest's height.
There will be about 30 people in the team, including three or four Indian scientists. "We don't know what happened, there's been no confirmed report," he said. "Some scientists do believe it has shrunk. But there's a school of thought it may have grown."
He told the Press Trust of India news agency that the team would take about a month to make its observations and another 15 days to compute and declare its data. He told the Press Trust of India news agency that a 30-strong team would take about a month to make its observations and another 15 days to compute and declare its data.