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DNA Explainer : What is the calculated height of Mount Everest?
In 1830, Sir George Everest became director of Survey of India. In 1831 he appointed Radhanath Sikdar a mathematician from WB to the post of Computer.
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Updated: Jan 13, 2021, 06:22 PM IST
Indian mathematician and surveyor Radhanath Sikdar was probably the first person to identify that Mount Everest (then known as peak XV) was the world s highest peak as he was the first person to calculate the height of the mountain in 1852. However it was officially announced in March 1856.
In 1830, Sir George Everest became the director of Survey of India and in the year 1831, he appointed Radhanath Sikdar, a mathematician from West Bengal, to the post of Computer in the Survey of India.
Cornwall has had 43 earthquakes recorded in the past 50 days
The biggest one was felt in several villages
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St Ives in Cornwall. Credit: PA
Dozens of earthquakes caused by human activity have been recorded in Cornwall.
In total, 43 induced seismic events have been reported in the west of the county since November 9.
Induced seismicity refers to earthquakes and tremors caused by human activity such as geothermal, oil and gas operations. They are typically minor.
All of the earthquakes recorded by the British Geological Survey in Cornwall originated from the Carharrack area, near Redruth.
They were all minor and of magnitudes which usually can only be felt by seismographs. The biggest one was recorded on December 8 at 10.46am. It had a magnitude of 1.7, which is low.
The family believe it should have explained that line speed is the speed drivers are expected to go at – and that they would be failing in their job if they did not go at line speed.
That failure to explain, they say, led to some people wrongly believing Brett was driving too fast, even though he was driving below the 75mph speed limit on that part of the track.
It is understood RAIB has agreed to consult the family before any future report is published to avoid a repeat.
Stephanie said: “I’m pleased the Evening Express is writing this piece to explain things for people who don’t know the railway.”