Which city has been reported (2025–26) by the India–US Earth observation mission, NISAR, to be sinking at more than 2 cm per month due to groundwater

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Which city has been reported (2025–26) by the India–US Earth observation mission, NISAR, to be sinking at more than 2 cm per month due to groundwater extraction?

TodaySprint · Accepted Answer

The correct answer is Option D: Mexico City. NISAR is a joint Earth observation mission of NASA and ISRO, launched in July 2025 for advanced planetary monitoring. NISAR uses Synthetic Aperture Radar (SAR) technology, which enables imaging through clouds and at night with high precision. The mission carries dual-frequency radar systems (L-band and S-band) along with one of the largest antennas deployed in space. NISAR is capable of detecting subtle Earth surface changes, especially ground deformation and land subsidence. Recent NISAR findings have highlighted severe land subsidence in Mexico City due to environmental stress. Mexico City is sinking at a rate exceeding 2 cm per month in some regions because of excessive groundwater extraction. The city’s vulnerability is linked to its geological setting on an ancient lakebed and aquifer system, which intensifies soil compression. Rapid urbanisation combined with continuous water pumping has significantly increased subsidence risk in Mexico City. NISAR provides near real-time monitoring of Earth’s surface, making it useful for urban planning and disaster risk reduction. Observations from October 2025 to January 2026 confirmed that NISAR data aligns with existing scientific predictions. The mission also contributes to climate resilience and environmental risk assessment on a global scale.

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Tokyo

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Jakarta

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Mumbai

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Bangkok

Which city has been reported (2025–26) by the India–US Earth observation mission, NISAR, to be sinking at more than 2 cm per month due to groundwater extraction?

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Which city has been reported (2025–26) by the India–US Earth observation mission, NISAR, to be sinking at more than 2 cm per month due to groundwater extraction?

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