Global Study Maps Urban Land Subsidence Trends
Satellite data from 465 cities identifies widespread ground sinking, helping urban planners assess structural risks.
Updated on Oct. 23, 2026 in Geography
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A global study published in Nature Cities analyzed satellite observations from 465 cities between 2014 and 2023 to map ground subsidence. The research identifies significant land sinking in major urban areas, with Mexico City recording the highest rate at 217 millimeters per year.
Why it matters
Understanding localized subsidence is critical for urban planning and infrastructure integrity as cities manage shifting terrain. This research quantifies the ground movement occurring across diverse global geographies.
Researchers tracked subsidence across 465 cities in 107 countries using satellite-derived data. In South Korea, high-rate subsidence—defined as exceeding 1 centimeter per year—was identified in 7.0 percent of Busan, 4.2 percent of Incheon, and 3.3 percent of Ulsan's urban footprints.
The players
Nature Cities
A scientific journal focused on publishing research regarding urban environments and city development.
The details
The team utilized high-resolution satellite observations to monitor vertical ground displacement over a nine-year period. By comparing subsidence rates in cities across 107 countries, they identified localized patterns of sinking. This measurement technique relies on analyzing shifts in terrain elevation captured by orbital sensors to map which urban sectors are settling faster than others.
Timeline
2014-2023: Researchers collected satellite data for the subsidence study.
October 23, 2026: Study published in the journal Nature Cities.
The Tech Race
This research provides a new global benchmark for monitoring urban ground displacement, expanding upon existing regional satellite monitoring efforts. It sets a new standard for cross-city analysis by comparing subsidence rates across 107 different countries simultaneously.
Urban planners and municipal engineers can use these findings to identify specific city zones requiring closer structural monitoring for subsidence risks. The data highlights which areas may require updated foundation standards to accommodate ongoing terrain shifts.
The takeaway
This study underscores the necessity of granular, satellite-derived terrain monitoring to manage long-term infrastructure health in growing cities. Readers should watch for future longitudinal updates to this dataset to determine if these subsidence rates are accelerating or stabilizing in specific regions.
Further reading
For more on the spatial dynamics of urban environments, visit the Geography section.
Source note: This article includes information reported by 경향신문.
Live Poll
Is ground subsidence a major threat to the long-term safety of your local infrastructure?
