How long does it take for islands to form after an underwater volcanic eruption?

So, vaguely, I remember from earth science that when submarine volcanoes erupt they eventually form archipelagos. My question actually has several parts;

• Starting with the first eruption to break surface, how long does it take for those islands to form and become habitable? i.e has vegetation, and sources of food, drinkable water.

• Without the use of modern technology, is there a way to know that the eruption occurred?

The antagonist in my current WIP is the deity of mountains and volcanoes, she creates these islands so she can have a place to do her scheming and such out of sight of the other deities. The eruption occurs in the middle of the ocean so the water is fairly deep. Saltwater if that makes any difference.

• Is this a quick or slow process, does she have the time to make the islands habitable before getting caught?

• How would the water itself be affected by the eruption? The aquatic animals?

  I know initially the water will be hot and the fishies will most likely not love that-- but after cooling etc. how does the pH change, mineral content, current, plant life, animal species change?

posted about 6 years ago

Noellektrae‭

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