large Internet outage in West Africa

On March 14, 2024, we observed a large outage in several West African countries. In Ivory Coast and Liberia, the outage was quite severe, affecting 93% of the active network blocks:

Serious Internet outages in Ivory Coast, beginning 2024-03-1409:00Z.

Fortunately some locations were able to partially recover from the problems, presumably by routing through different paths:

Lagos, Nigeria showed outages starting at 2024-03-14t08:00Z, with a partial recovery around t15:00Z.

The root cause for these outages is likely a problems in multiple undersea telecommunication cables, as has been reported in the Washington Post and the Guardian, among other places.