US–Indian space mission maps extreme subsidence in Mexico City

So, perhaps a dumb question, but the article mentions that 14 steps have been added to the base of the Angel of Independence monument, and the Wikipedia article mentions the same things:

> Originally, nine steps led to the base, but due to the sinking of the ground, an ongoing problem in Mexico City, fourteen more steps have been added.

So why didn't the monument itself also sink? Does it have piles going down to bedrock or something?

The amount of subsidence is quite dramatic, up to 25 cm per year!

What are the practical consequences of this today, and what is being done to remedy this?

For the uninitiated, ISRO -> Indian Space Research Organization

Cloudflare: verification rejected. Accessing from Japan.

Thank you very much, Cloudlare.

I really can't believe that an issue discovered in 1925 still isn't solved. A kind of issue which wont take a Nobel prize to be solved. This is sad.

Uh, you know, from the original source - Nasa (2 points, 2 days ago) https://news.ycombinator.com/item?id=47970672

Real shame this re-report made the SCP

I get that the article is primarily about the satellite capabilities, but it's rather annoying it doesn't mention what the future impact of the subsidence might be.

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