I just logged in to post this very thing. Per Volcanodiscovery.com there are signs of uplift that has occurred in since the quake swarm began 10 days ago due to magma movement.
https://www.volcanodiscovery.com/santorini/news/264176/Santorini-volcano-update-Weak-ground-uplift-reported-possibly-sign-of-volcanic-unrest.html
Volcanic unrest is the worst kind. :^)