Five tiny Pacific islands have disappeared due to rising seas and erosion, a discovery thought to be the first scientific confirmation of the impact of climate change on coastlines in the Pacific, according to Australian researchers.

The submerged islands were part of the Solomon Islands, an archipelago that over the last two decades has seen annual sea levels rise as much as 10 millimeters (.4 inch), according to research published in the May issue of the online journal Environmental Research Letters.

The missing islands, ranging in size from 1 (2.5 acres) to 5 hectares (12.4 acres) were not inhabited by humans.