According to a new NASA study, “The Birth of a New Tongan Island.
In late December 2014 into early 2015, a submarine volcano in the South Pacific Kingdom of Tonga erupted, sending a violent stream of steam, ash, and rock into the air. When the ash finally settled in January 2015, a newborn island with a 400-foot summit nestled between two older islands – visible to satellites in space. The newly formed Tongan island, unofficially known as Hunga Tonga-Hunga Ha’apai after its neighbors, was initially projected to last a few months. Now it has a 6- to a 30-year lease on life”.

https://www.cnn.com/2019/02/05/australia/new-island-pacific-mud-intl/index.html

https://en.wikipedia.org/wiki/Hunga_Tonga