Hindu Kush Earthquakes May Have Long-Lasting Effects: Report
The Hindu Kush region, prone to frequent tremors, may have significant effects on parts of Pakistan and Afghanistan.
The recent wave of tremors that have shaken the Hindu Kush regions of Pakistan and Afghanistan may have lasting impacts on the topography of areas as far afield as Islamabad, experts said.
On Friday, the region was shaken by at least four distinct tremors, ranging in intensity from 3.3 to 5.3, according to the Pakistan Meteorological Department (PMD), the strongest of which was felt in parts of Khyber-Pakhtunkhwa.
Two of the quakes originated in the Hindu Kush region, while the other two were located in the Afghanistan-Tajikistan border region, Dawn cited PMD as saying on its website.
All of the quakes occurred deep under the earth’s crust, with at least three of the quakes measuring over 100 km in depth.
Over 100 seismic events have been recorded in the region over the past six months alone. Some rocked the earth like a boat, while most of them went unnoticed.
Like the four on Friday, the vast majority of these events originated in parts of the Hindu Kush range located in Afghanistan and Tajikistan and were felt as far afield as Islamabad and Lahore.
The region is roughly located on top of the meeting point for the Indian and Eurasian tectonic plates.
The US Geological Survey (USGS) has termed the Hindu Kush “one of the most seismically hazardous regions on earth.”
However, nearly all of the recent tremors felt in the region originated deep in the earth’s crust, nearly 200 km below the surface.
In a report on earthquakes in this region, the USGS noted:
The Hindu Kush shares this high-stress configuration with a seismically active area in Colombia, South America.US Geological Survey (USGS)
These two regions have some of the world’s highest rates of deep earthquakes.
According to a report by the National Geographic Society, the two plates collide at a rate of about 1.5 inches a year, pushing up the Himalayan mountain range in the process.
Due to friction along the plate boundaries, the collisions are not smooth or even. When the rocks finally give way under the strain, the plates jerk rapidly, releasing the energy that causes an earthquake.
With the collision of plates pushing land upwards, nearby regions including Islamabad may gradually end up gaining altitude.
Some areas can start sinking too. For example, La Paz, the capital of Bolivia, is sinking lower because mountains around it are rising.A Met official
The massive 2005 Kashmir earthquake was also the result of collisions between these two tectonic plates.
The deadly Nepal earthquake on 25 April, 2015, that triggered a massive avalanche on Mount Everest, was caused by a sudden release of built-up stress along the same fault line, USGS reported.
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