Tori-shima (Torishima or Izu-no-Torishima) is a stratovolcano forming a small 2.7 km wide circular island in the southern Izu volcanic chain. Historical eruptions have occurred from summit and flank vents near the north coast as well as from submarine vents. Several other Japanese island volcanoes are called Tori-shima ("Bird Island"). Torishima volcano is capped by an unvegetated summit cone which formed during an eruption in 1939. Fresh lava flows from this eruption form part of the northern coastline of the basaltic-to-dacitic edifice. The main cone contains a 1.5-km-wide caldera with 2 central cones, with Iwo-yama being the highest. A 6-8 km wide submarine caldera belonging to an older volcanic edifice is located immediately to the north of Tori-shima. Tori-shima is located in the Philippine Sea approximately 600 km (373 mi) south of Tokyo and 76 km (47 mi) north of Lot's Wife.