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There's a couple of examples at https://teara.govt.nz/en/photograph/31154/greendale-fault of what might euphemistically be called an "internal distortion" near the edge of a tectonic plate.

Parts of Japan moved ~4 meters during a recent earthquake.

https://slate.com/news-and-politics/2011/03/japanese-earthqu...

> "parts of" japan.

I think this alone means the question in the blog post is answered.

OSM should pick a datum time, used for persistent storage, and then store a time-varying deformation model to adjust the way things are displayed. That deformation model needs to allow all kinds of warping etc.

A 2016 earthquake in New Zealand had a slip of 10m along one fault: https://watchers.news/2016/11/16/kaikoura-earthquake-new-zea...

California moves in dozens of places each year, in small amounts.. rely on it

Ridgecrest quakes shifted some area over a meter.