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==Geography== | ==Geography== | ||
With a total area of 42.7 km2 (16.5 sq mi),<ref>https://www.ndmc.gov.in/ndmc/act.aspx</ref> New Delhi forms a small part of the Delhi metropolitan area.[30] Since the city is located on the [[Indo-Gangetic Plain]], there is little difference in elevation across the city. New Delhi and surrounding areas were once a part of the [[Aravali Range]]; all that is left of those mountains is the [[Delhi Ridge]], which is also called the Lungs of Delhi. While New Delhi lies on the floodplains of the [[Yamuna River]], it is essentially a landlocked city. East of the river is the urban area of [[Shahdara]].<ref>https://web.archive.org/web/20080302220220/http://www.ndmc.gov.in/AboutNDMC/NNDMCAct.aspx</ref> | With a total area of 42.7 km2 (16.5 sq mi),<ref>https://www.ndmc.gov.in/ndmc/act.aspx</ref> New Delhi forms a small part of the Delhi metropolitan area.[30] Since the city is located on the [[Indo-Gangetic Plain]], there is little difference in elevation across the city. New Delhi and surrounding areas were once a part of the [[Aravali Range]]; all that is left of those mountains is the [[Delhi Ridge]], which is also called the Lungs of Delhi. While New Delhi lies on the floodplains of the [[Yamuna River]], it is essentially a landlocked city. East of the river is the urban area of [[Shahdara]].<ref>https://web.archive.org/web/20080302220220/http://www.ndmc.gov.in/AboutNDMC/NNDMCAct.aspx</ref> | ||
===Seismology=== | |||
New Delhi falls under the seismic zone-IV, making it vulnerable to earthquakes.It lies on several fault lines and thus experiences frequent earthquakes, most of them of mild intensity. There was a spike in the number of earthquakes between 2011 and 2015, most notable being a 5.4 magnitude earthquake in 2015 with its epicentre in Nepal, a 4.7-magnitude earthquake on 25 November 2007, a 4.2-magnitude earthquake on 7 September 2011, a 5.2-magnitude earthquake on 5 March 2012, and a swarm of twelve earthquakes, including four of magnitudes 2.5, 2.8, 3.1, and 3.3, on 12 November 2013.<ref>https://web.archive.org/web/20060519100611/http://www.undp.org.in/dmweb/hazardprofile.pdf</ref> | |||