The Himalayan mountains, pushed up by the collision of tectonic plates, are prone to devastating quakes. An earthquake in April 2015, Nepal's worst in 80 years, killed over 8,600 people.[17]
The last major earthquake in the same region of similar magnitude (7.6 Mw) was almost exactly ten years prior in October 2005, which resulted in 87,351 deaths, 75,266 injured, 2.8 million people being displaced, and 250,000 farm animals dying. The notable difference between this earthquake and the 2005 earthquake is the focal depth and its location with respect to the densely populated areas.[18] The 2005 earthquake was 15 km deep and centered close to some densely populated areas while this earthquake was 212.5 km deep and centered farther from populated areas, reducing its damaging effects.[19]
In recent studies, geologists claim that global warming is one of the reasons for increased seismic activity. According to these studies melting glaciers and rising sea levels disturb the balance of pressure on Earth's tectonic plates thus causing an increase in the frequency and intensity of earthquakes. This could be one of the reasons why the Himalayas are getting more prone to earthquakes in recent years.[20][better source needed]
Earthquake
The main earthquake occurred on 26 October 2015 at 13:39 AFT (14:09 PKT, 14:39 IST, 09:09 UTC)[1][2] at a depth of approximately 231.0 km, with its epicenter approximately 82 km southeast of Feyzabad, Afghanistan. The USGS initially measured the quake's magnitude at 7.7, then revised it down to 7.6 and later to 7.5. The Pakistan Meteorological Department, however, said the magnitude of the earthquake was 8.1.[21] According to USGS, the epicentre was 67 km from Chitral.[22][23][24]
The earthquake resulted in 280 fatalities, 1,770 injuries, and damage to 109,123 buildings.[7][28] There were 202 deaths and 1,486 injuries in Khyber Pakhtunkhwa; 30 deaths and 59 injured in the Federally Administered Tribal Areas; nine deaths and 30 injuries in Gilgit-Baltistan; five deaths and 78 injuries in Punjab and two deaths and 12 injuries in Azad Kashmir.[25] The most affected areas from Khyber Pakhtunkhwa include Shangla, Lower Dir, Upper Dir, Swat and Chitral, which were in close proximity of the epicenter.[29][28] As a result of land sliding, the Karakoram Highway was closed.[30] The observed damage was mostly concentrated in rural and old urban masonry buildings, both being built with no or minimal consideration for earthquake loading and having been constructed employing poor construction practices.[31]
India
Four people were killed and 20 others were injured in Jammu and Kashmir.[10] A Delhi Metro spokesman told AFP "All of around 190 trains plying on the tracks were stopped at the time of the earthquake." Mobile phone services were choked for several hours because of the high voice traffic.[32]
Pakistani Prime Minister Nawaz Sharif directed all federal, civil, military and provincial agencies to declare an immediate alert and mobilise all resources to ensure the security of citizens of Pakistan. According to Inter-Services Public Relations, Chief of Army Staff General Raheel Sharif has directed army personnel to reach out where required to help affected people without waiting for orders.[22][23]
^ abcdeNational Geophysical Research Institute (26 October 2015). "afg.doc"(PDF). Archived from the original(PDF) on 3 March 2016. Retrieved 28 October 2015.
^ abIsmail, Najif; Khattak, Nouman (25 August 2016). "Building typologies prevalent in Northern Pakistan and their performance during the 2015 Hindu Kush Earthquake". Earthquake Spectra. 32 (4): 2473–2493. Bibcode:2016EarSp..32.2473I. doi:10.1193/012116eqs022m. S2CID113440383.
