Up to 2cm a month: Nasa keeps track as Mexico City sinks into the ground
Summary
NASA and the Indian Space Research Organization use a powerful satellite called Nisar to monitor Mexico City’s sinking. The satellite detects small movements of the land, showing that some parts of the city are sinking by more than 2 cm each month.Key Facts
- Mexico City is slowly sinking, causing buildings and roads to tilt or crack.
- Nisar is a radar satellite that can see very small changes in Earth’s surface every week.
- It can capture images even through clouds or thick plants.
- Some areas of Mexico City, including the airport, sink over 2 cm per month.
- The sinking is caused by years of pumping water from underground, which makes soft soil compress.
- Nisar can also help study earthquakes, volcanoes, landslides, climate change, and more.
- The sinking damages city infrastructure like water pipes, streets, and the metro.
- Mexico City’s sinking has been known since 1925, but Nisar gives a detailed, real-time view.
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