Global Volcanism Program | Image GVP-01425
This entire flat forested plain, known as Aokigahara ("Blue Tree Plain") is underlain by a single massive lava flow from Fuji. A major explosive and effusive eruption began in June 864 CE from Nagaoyama, a vent on the NW flank. Lava flowed into lakes Motosu and Senoumi, destroying lakeshore farm houses. It divided Lake Senoumi into the two present-day lakes of Shoji-ko (seen here in the distance against a Tertiary mountain range to the NW) and Sai-ko. The Aokigahara Marubi lava field covered an area of 32 km2.
Photo by Lee Siebert, 1977 (Smithsonian Institution).
Keywords: lava flow