I think we’re all aware of the new eruption off of El Hierro in the Canary Islands – the first eruption in the Canaries in 40 years and the first at El Hierro in possibly 2500 years. After months of preamble, it now looks like two eruptions occurred, both submarine, in depths of a few hundred meters.
If the eruption continues, one might expect Surtseyan style volcanism as the vent nears the surface and maybe even small, ephemeral islands.
If the mention of Surtsey doesn't ring a bell: it's a tiny island off of southern Iceland that built up from the seawater-cooled byproducts of undersea eruptions between 1963 and 1967 - in other words, an island that wasn't there 50 years ago. How cool is that? It may be time to redraw the maps!