BackgroundPre-caldera eruptive activity at Towada dates back to about 2 million years ago and produced basaltic-to-dacitic lava cones. Following the late-Pleistocene andesitic-to-rhyolitic caldera-forming eruptions, the basaltic Ninokura stratovolcano grew in the SSE section of the caldera. The successive dacitic-to-rhyolitic Goshikiiwa explosive eruptions led to the formation of the roughly 2-km-wide Nakanoumi caldera. The andesitic-to-dacitic Ogura-yama lava dome was built over the NE rim of Nakanoumi.
(Source: Smithsonian / GVP volcano information)
See also: Sentinel hub | Landsat 8