Aspronisi island Santorini caldera
The next eruptions took place during the years 1707-1711 AD in the caldera. A strong earthquake occurred on May 21st, 1707 and three days later a white island, known as Aspronisi, emerged from the sea. It consisted of pumice and big lava pieces. The island was growing more and more and it became almost 80 meters high and 600 meters wide.
Two weeks later, a black lava island appeared to the north of Aspronisi and it had been unified with Aspronisi by the next September, given that it was growing bigger continuously. Several explosions followed and great amounts of ash were laid down. On September 1711, a strong eruption caused the subsidence of the coasts of Thera and Nea Kameni islands. Two coves were created on Nea Kameni island, one to the south west which was named as Georgios an done to the southeast which is known as Vulcano from where sulphide steams rose, painting the sea water yellow.
The good thing of the sulphide water was that they cleaned the hulls of the ships that anchored there, removing the bronze layer as well as the marine micro-organisms that stuck on the hulls. What is more, the locals took advantage of the sulphide springs as thermal baths. They built some houses on the island, where they resorted during the summer.