新期雲仙火山（中央右）と古期雲仙火山（中央左）。新期雲仙火山（妙見岳火山、普賢岳火山など）は東西に延びる雲仙地溝の中にあり、左（北）の古期雲仙火山噴出物との間に雲仙地溝の北縁、千々石断層がある。北西より1991年3月撮影。

Younger Unzen Volcano (right background) and Older Unzen Volcano (left background), as viewed from the NW. Chijiwa Fault located at the northern end of Unzen Graben between Younger and the Older Unzen volcanic deposits. Younger Unzen Volcano Group, including Myokendake and Fugendake volcanoes, located inside Unzen Graben extending E-W.