Mexico City Drops Nearly Ten Inches Annually in Unprecedented Space-Visible Collapse

A Century-Long Crisis Captured from Orbit

Mexico City is experiencing one of the most dramatic urban collapses in modern history, with the metropolis sinking by nearly 10 inches annually according to newly released satellite imagery from NASA. Over the course of less than a century, the drop has been more than 39 feet , making this one of the fastest-subsiding capitals on Earth.

The crisis has become so severe that the subsidence can be spotted from space . NASA's estimates are based on measurements taken between October 2025 and January 2026 by a powerful satellite known as NISAR , a joint mission between NASA and the Indian Space Research Organization that represents one of the most advanced radar systems ever launched.

In some parts it is happening at an average rate of 0.78 inches per month, such as at the main airport and the iconic monument commonly known as the Angel of Independence . The famous monument, built in 1910 to commemorate 100 years of Mexico's independence, has had 14 steps added to its base as the land around it gradually sinks .

Ancient Lake Bed Collapses Under Modern Pressure

Home to some 20 million people, the Mexico City area is built atop an aquifer . Extensive groundwater pumping, combined with the weight of urban development, has resulted in the compaction of the ancient lakebed beneath the city for more than a century . This isn't a new phenomenon— an engineer first documented the issue in 1925, and by the 1990s and 2000s, parts of the metropolitan area were sinking by around 14 inches per year .

The visible consequences are everywhere. The city was built on a drained lake bed and many buildings are noticeably tilted, from sinking unevenly into the soft earth over decades or centuries . The infrastructure damage extends beyond aesthetics— the subsidence has damaged infrastructure including the Metro, one of the largest rapid transit systems in the Americas .

Cutting-Edge Technology Reveals Alarming Details

The NISAR satellite can track real-time changes across Earth's surface from orbit, unhindered by clouds or vegetation that impede optical sensors and higher-frequency radars . The dark blue color indicates areas found to be subsiding by more than half an inch per month, due in large part to groundwater pumping .

The satellite passes over the same point on Earth's surface twice every 12 days, building a consistent record that researchers can compare over time to detect motion measured in millimeters . The mission is designed to serve not just NASA researchers but government agencies, urban planners, and disaster-risk teams around the world who need reliable ground-deformation data .

Understanding Before Solutions

"We have one of the fastest velocities of land subsidence in the whole world" , according to researchers studying the phenomenon. "Mexico City is a well-known hot spot when it comes to subsidence, and images like this are just the beginning for NISAR" , said David Bekaert, a project manager and member of the NISAR science team.

Imagery from the NISAR satellite and the data that comes with it will be key for scientists and officials as they plan on how to address the problem . Mexico City's next dry season will produce another comparable set of measurements, giving scientists a cleaner year-over-year look at how the city's sinking lakebed is responding to any changes in water use or urban load above it . As researchers emphasize, understanding the precise mechanics of this unprecedented urban collapse represents the crucial first step toward any meaningful intervention.