Mexico City’s Accelerating Subsidence Mapped by NASA-ISRO NISAR Satellite

Preliminary NISAR measurements from 25 Oct 2025 to 17 Jan 2026 show zones sinking at rates exceeding 2 cm (0.8 in) per month. Dark-blue signatures in the L-band radar image mark the fastest-deforming areas, while adjacent yellow and red tones are identified as residual noise pending further observations.

The Watchers

Mexico City sits on Lake Texcoco basin, where a clay-rich aquifer supplies 60 % of water for its 20 million residents. Over-pumping has drained the aquifer. Subsidence was recorded in 1925; rates reached 35 cm (14 in) per year, and studies report up to 500 mm (20 in) annually in zones.

NASA reports that Mexico City is sinking up to 2 cm per month

NISAR’s L-band radar detected deformation of a few millimeters, exposing velocity gradients between stable and sinking zones. It recorded a cumulative settlement of 3.661 m (12 ft) over ten years at monitoring site (0.314 m / yr). The affected corridor runs past Benito Juárez International Airport and the Angel of Independence.

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The sinking fractures roads, water mains, and the Metro, forcing brake redesigns and flood protection. Historic landmarks show effects: the Angel of Independence needed 14 extra steps, and the Metropolitan Cathedral is tilting. Repeated pipe ruptures increase reliance on the over-exploited aquifer.

NASA reports that Mexico City is sinking up to 2 cm per month

NASA’s Jet Propulsion Laboratory said the deformation “is largely driven by groundwater pumping and compaction of the ancient lakebed.” JPL noted that NISAR’s L-band radar “can operate day and night and through cloud cover, allowing measurement of land sinking.” Agencies emphasized monitoring to guide mitigation.

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Urban-planning experts argue that current water-management policies “do not address the root cause of subsidence,” warning that continued over-extraction will outpace engineering fixes and increase the risk of infrastructure collapse.

NASA reports that Mexico City is sinking up to 2 cm per month

NISAR reports subsidence above 2 cm / month, whereas field studies cite averages of 500 mm (20 in) and peaks of 35 cm (14 in) per year. Yellow and red signatures are labeled “residual noise,” indicating uncertainty. No data detail aquifer drawdown depth, leaving a gap in linking extraction volumes to deformation.

The Watchers

"The capital is sinking up to 2 cm per month, raising alarms about infrastructure and water supply." — NASA report, *Theyucatantimes.com*

NASA reports that Mexico City is sinking up to 2 cm per month

"Iconic landmarks like the Ángel de la Independencia monument have required 14 additional steps to be added to their bases as the ground drops." — *Theyucatantimes.com*

NASA reports that Mexico City is sinking up to 2 cm per month

"The satellite can operate day and night and through cloud cover, allowing repeated measurement of land sinking, land uplift, glacier motion, and crop growth during multiple overpasses each month." — NASA/JPL description

The Watchers

"JPL attributed the deformation in large part to groundwater pumping and long-term compaction of the ancient lakebed beneath the metropolitan area." — NASA/JPL statement

The Watchers

NISAR will continue monthly overpasses to refine deformation maps, while Mexico City officials evaluate stricter groundwater-extraction limits and engineering retrofits for vulnerable infrastructure.

The Watchers