Karachi Trembles: Buildings at Risk from Quakes & Subsidence

Karachi, Pakistan's largest city, is facing heightened seismic activity, with numerous mild earthquakes recorded in recent months. Experts express concern over the frequency of these tremors, noting that Karachi's location near major tectonic plates and fault lines makes it prone to seismic events. The city's vulnerability is exacerbated by issues of unregulated construction and excessive groundwater extraction, leading to land subsidence.

These factors combined weaken building structures, making them susceptible to collapse even from moderate earthquakes. A 2023 study indicated subsidence rates of up to 17 mm annually in key areas. The city's older buildings and those constructed on weak soil foundations are particularly at risk. Experts emphasize that a repeat of a major historical earthquake could devastate large parts of coastal Karachi.

To mitigate these risks, experts call for stricter enforcement of building codes, improved urban planning that integrates drainage and land-use zoning, and better management of groundwater extraction. Geophysical surveys are also recommended to map fault behaviour and ground deformation. Increased public awareness and disaster preparedness drills are crucial to safeguarding residents against potential seismic disasters.