Um, a volcanic island. Really.
What is it
H
It would take a long time but eventually either a new island will form or if the underwater volcano is close enough to land a current island we become larger
Kilauea
An underwater volcano is called a submarine volcano.
Lo'ihi Seamount
Because that's where it IS. It's very difficult to move a volcano to another island.
Eventually it would break through the surface of the ocean and then form an island.
The underwater volcano would eventually emerge from the sea and become an island. For example, each of the islands in the Hawaiian Islands chain were formed from vocanoes, and the Big Island of Hawai'i is STILL erupting. Iceland was created the same way. Many South Pacific islands were originally undersea volcanoes which erupted, formed an island, and the island became ringed with coral reefs.
Because most of the lava goes underwater and takes years for the lava to rise up to make an island bigger.
It would take a long time but eventually either a new island will form or if the underwater volcano is close enough to land a current island we become larger
No, the Stromboli volcano is on an island.
Kilauea
An island
An underwater volcano is called a submarine volcano.
Lo'ihi Seamount
Because that's where it IS. It's very difficult to move a volcano to another island.
There are two volcanoes located on the island of Oahu in Hawaii. These volcanoes include Waianae and Koolau. The last time that either of these volcanoes erupted was approximately 1.8 million years ago.
The Bárðarbunga volcano in Iceland (currently erupting) is an example. A diverging plate boundary passes through the island of Iceland.