Stromboli is a small island in the Tyrrhenian Sea, off the north coast of Sicily, containing one of the three active volcanoes in Italy. It is one of the eight Aeolian Islands, a volcanic arc north of Sicily. This name is derived from the Ancient Greek name Strongulē which was given to it because of its round swelling form. The island’s population is about 500. The volcano has erupted many times and is constantly active with minor eruptions, often visible from many points on the island and from the surrounding sea, giving rise to the island’s nickname “Lighthouse of the Mediterranean”. Stromboli’s most recent major eruption was on April 13, 2009. Stromboli stands 926 m (3,034 ft) above sea level, and over 2,700 m (8,860 ft) on average above the sea floor. There are three active craters at the peak. A significant geological feature of the volcano is the Sciara del Fuoco (“stream of fire”), a big horseshoe-shaped depression generated in the last 13,000 years by several collapses on the northwestern side of the cone. Two kilometres to the northeast lies Strombolicchio, the volcanic plug remnant of the original volcano. Mt. Stromboli has been in almost continuous eruption for the past 2,000 years.