Only two of the Galápagos Islands are still actively forming: Fernandina and Isabela.

Quick Scoop: How many of these islands are still forming?

If you’re asking this in the context of the Galápagos (which is how this question is usually framed in recent geography and science explainers), the answer is:

  • Two islands are still forming
    • Fernandina Island – the youngest and most volcanically active in the archipelago.
* **Isabela Island** – also highly active, built from multiple large volcanoes that still add new lava flows.

These two sit over or closest to the Galápagos hotspot, so ongoing eruptions keep adding fresh rock and reshaping their coastlines , which is why geologists count them as “still forming” today.

Why only these two?

  • The Galápagos chain was created by a mantle plume (hotspot) under the Nazca Plate; as the plate moves, new volcanoes and islands form to the west while older ones drift east and erode.
  • Westernmost = youngest = most active. Fernandina and Isabela are at that younger, more active end, with:
    • Frequent eruptions
    • High seismic activity
    • Fresh lava fields and active vents
    • Coastlines being extended by new lava flows entering the sea

Other Galápagos islands may have occasional minor activity, but they’re considered mature , meaning they’re no longer substantially building new land.

Mini FAQ

Q: Does this mean no new Galápagos islands will ever form?
No. As the Nazca Plate keeps moving over the hotspot, new volcanic islands are expected to emerge further west in the future , continuing the chain.

Q: Are there other “still forming” islands in the world?
Yes. Examples often mentioned include parts of Hawaii’s Big Island , which is still growing from active volcanoes, and the submarine volcano Lōʻihi , which is slowly building toward eventually becoming a new island.

TL;DR: In the Galápagos, two islands — Fernandina and Isabela — are still actively forming today.

Information gathered from public forums or data available on the internet and portrayed here.