Why In News?
Extensive ground fissures and structural damage in villages across Uttarakhand's Bageshwar district triggered urgent safety alarms over unscientific open-cast and underground soapstone mining destabilizing fragile Himalayan slopes.
What is Land Subsidence?
Land subsidence is the gradual settling, sinking, or sudden downward collapse of the Earth's surface caused by the subsurface removal, compaction, or displacement of geological materials (soil, rock, water, or minerals).
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Gradual Ground Sinking: Slow, progressive vertical settlement of ground layers over months or years, often escaping early visual detection until structural cracks manifest on surface buildings.
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Differential Subsidence: Uneven ground sinking where one portion of a slope or building foundation settles faster than adjacent areas, inducing intense shearing stress and fracturing walls, foundations, and roads.