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Why Tehran is sinking dangerously

Researchers have used data from radar satellites to measure the subsidence of the Earth's surface in the Tehran region in Iran. They found out that between 2003 and 2017 three areas sank there with rates of sometimes more than 25 centimeters per year, and several meters in total. For the first time, this study traces in detail the subsidence in this region over a longer period of time.
Researchers have used data from radar satellites to measure the subsidence of the Earth's surface in the Tehran region in Iran. They found out that between 2003 and 2017 three areas sank there with rates of sometimes more than 25 centimeters per year, and several meters in total. For the first time, this study traces in detail the subsidence in this region over a longer period of time.

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