Which side faces the US, the right or left? The left, I think. So the wall above Frontera is the one that would “slide” down into the ocean?
La Palma was the most mentioned doom scenario. That’s one of the Eastern Canaries. The one with the crack in it that runs a good length of the island.
The one that spawned the report on it crashing into the ocean and causing a huge tsunami is the Cumbre Vieja on La Palma island. The volcano section they mentioned in the report is on the WNW coast of the island, basically directly at NYC.
El Hierro is the island directly to the south of La Palma.
The west coast faces into the Atlantic, east towards Africa.