The Greenland sea cables are probably being closely monitored, but redundancy seems minimal likely limited to OneWeb satellite connectivity and some VSAT links.
Looking at the routing side, AS8818 announces just two /19s and one /22 (and two /32s in IPv6) with a single upstream provider, Level 3 Inc. This suggests that Layer 3 redundancy is even more constrained.
I would have expected at least one EU-based provider as an additional upstream...
@HonkHase
For historical/technical background:
Asianometry did two episode a few months ago on the topic
1) history of sub sea cables
https://www.youtube.com/watch?v=AFt9le2ytW0
2) history of fibre optical cables.
https://www.youtube.com/watch?v=aNuj1_8NDEc
"The break in Cinia's C-Lion1 submarine cable has been repaired and the direct submarine cable connection between Finland and Germany is back online and fully operational."
Impressive!
π https://www.cinia.fi/en/news/cinias-c-lion1-submarine-cable-has-fully-restored
Alexandre Dulaunoy
adorfer