New Delhi (PTI): Three pre-shocks spread over 10 days ahead of the 6.3-magnitude earthquake that struck Nepal on November 9 helped avert a bigger tragedy in the Himalayan region bordering Pithoragarh in Uttarakhand, a senior official said on Thursday.

Three earthquakes a 4.1 magnitude temblor at 9.11 am on October 30 and two on November 8 of 3.5 magnitude and 4.9 magnitude helped release a lot of accumulated stress in the seismologically-active Himalayan region, O P Mishra, Director of the National Centre for Seismology told PTI.

He said all the earthquakes had their epicentre about 90 km east-southeast of Pithoragarh in Nepal between the South Almora Thrust and the North Almora Thrust and the shockwaves travelled towards Delhi along the Moradabad fault.

"The biggest safety point of Himalayan region is that smaller quakes keep on happening and there is leakage of stress," said Mishra, who carried out a study of the recent earthquakes in the region.

He said the release of stress by the three pre-shocks also ensured that the after-shocks of the 6.3 magnitude temblor did not cause much damage.

"Also, the after-shocks were fewer in number. Had the three pre-shocks not happened, there could have been a series of aftershocks," Mishra said.

The 6.3 magnitude earthquake was followed by four aftershocks two on November 9 at 3:15 am (3.6 magnitude) and at 6:27 am (4.3 magnitude). Another 3.6 magnitude quake occurred in the region at 4:58 am on November 10.

The 5.4 magnitude earthquake at 7:57 pm on November 12 was also an aftershock of the 6.3 magnitude temblor of November 9 and its impact was also felt in the national capital region.

Four major earthquakes were recorded in the Himalayan region over the past 150 years, including the tremors in Shillong in 1897, in Kangra in 1905, in Bihar-Nepal in 1934 and in Assam in 1950.

An earthquake occurred in Uttarkashi in 1991 followed by one in Chamoli in 1999 and one in Nepal in 2015.

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Kanpur (UP), Dec 3: A 17-year-old vegetable vendor lost his leg after being run over by a train while he was collecting his belongings allegedly thrown on a track by police personnel during an anti-encroachment drive here.

Deputy Commissioner of Police (West) Vijay Dhull told PTI that Head Constable Rakesh Kumar has been placed under suspension.

Police initiated an inquiry after several purported videos surfaced online showing the boy lying on the tracks asking for help as policemen and people try to rescue him, a senior official said.

"Prima facie, it appears Kumar showed negligent behaviour," Dhull said, adding that Assistant Commissioner of Police (Kalyanpur) Vikas Pandey has been asked to conduct the inquiry and submit a report at the earliest.

Police personnel had thrown a container of the victim, identified as Arsalan alias Irfan of Rawatpur area, and when he had gone on the railway track to pick it up, he was run over by a train on Friday, Dhull said.

Arsalan lost his right leg and suffered serious injuries to his left leg. He was taken to the Lala Lajpat Rai Hospital from where he was shifted to the SGPGIMS where a surgery was performed on Saturday, he said.

Dhull confirmed that several purported videos of the incident have gone viral and police are trying to obtain the mobile clips and pictures. These will help police to establish the sequence of events, he said.

Interacting with reporters, a local, who identified himself as Mohammad Shanu, claimed that the victim lost his leg after being hit by a train when he was collecting his weighing scale thrown on the tracks by police during an anti-encroachment drive.

The victim's father Saleem, an auto-rickshaw driver, told media persons that his son's leg were severed on the spot.