The rounded Ogurayama lava dome to the upper right formed at the end of the 915 CE Towada eruption. Three eruptions were accompanied by the emplacement of the 5 km³ Kemanai pyroclastic flow, which covered several large wooden buildings along the Yonesawa River. The dome formed along the NE rim of the Nakanoumi caldera, with its SW rim forming the peninsula in the center of the photo. The northern wall of Towada caldera appears in the distance.

Photo by Lee Siebert, 1977 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Keywords: caldera | lava dome

Towada