Tuesday, April 20, 2021
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More units to monitor seismic activity in Delhi | Delhi News – Times of India

NEW DELHI: Owing to a large number of earthquakes hitting Delhi and National Capital Region (NCR) over the last one year, National Center for Seismology (NCS) on Wednesday said it had deployed additional earthquake recording instruments to closely monitor seismic activity.
Additional machines have also been deployed to carry out field studies in the region, which will characterise sub-surface structures, officials said.
NCR had been experiencing a number of minor and medium-intensity earthquakes between April and August 2020. During this spell, the epicentre of the earthquakes was found to be located in areas such as northeast Delhi, Rohtak, Sonipat, Baghpat, Faridabad and Alwar. The seismology centre, which falls under the ministry of earth sciences, said experts were consulted before 11 additional temporary field stations were deployed in the months of May and June 2020, which are currently operational.
It said magnetotelluric (MT) geophysical surveys, which involve measurement of the time-varying electric and magnetic fields to determine distribution of electrical conductivity in the subsurface, had being carried out in collaboration with Wadia Institute of Himalayan Geology (WIHG), Dehradun, across the Moradabad Fault (in Moradabad and its surrounding areas) and Great Boundary Fault (in Bareilly and its surrounding areas).
“The MT survey has been completed across major faults of the Delhi region such as Mahendragarh-Dehradun Fault, Sohna Fault, Mathura Fault, Moradabad Fault and Great Boundary Fault. The data analysis is in progress,” said NCS on Wednesday.
A total of nine earthquakes have been recorded in the Delhi region in the last three months, with their magnitude ranging between 1.8 and 2.9 and were mostly located in west Delhi, south-west Delhi, Rohtak, Sonipat, Baghpat, Bahadurgarh and Ghaziabad.

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