Europe's Internet resilience mitigates impact of submarine cable cuts

Can anyone explain why there wasn't any BGP activity on the Finland-Germany systems when the cable broke, while for Lithuania there was a massive spike?

Unfortunately it's been a long time since I learned about BGP, if anyone could help out here I'd be grateful.

Each BGP hop represents an ISP so when an ISP reroutes traffic internally there's no need for changes to external BGP announcements. Clearly ISPs in the Baltic region have multiple paths and don't depend on any one cable.