Aso's caldera wall.
Aso's caldera wall.
All photographs courtesy of and copyrighted by Mike Lyvers.
 | The central complex of active and inactive volcanoes in the middle of the caldera from the same viewpoint as above. |
Naka-dake, the active crater, blowing a smoke ring.
 | The inactive craters at Naka-dake with people standing on the rim of the active crater (out of sight to the left) for scale. |
A sulfurous lake in one of the inactive craters.
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| A panorama of Naka-dake's active (left) and inactive craters (right), summer 1990. |
 | Some of the concrete bomb shelters placed near the edge of Naka-dake's active crater for tourists to shelter in if there is a shower of bombs. |
The crater edge and steam column.
 | A view looking down inside Naka-dake's active crater. By day, steam obscures the view but minor fireworks were visible at night - winter 1991. |
 | Dr. Kikuchi of the Aso Volcanological Laboratory and his system of underground lasers which he uses to measure the degree of inflation of the volcano. |
The bomb shelters buried in recent ashfall prior to the summer of 1992.
 | The crater with a lake formed during the rainy season of 1992. There were occasional small geyser-like eruptions from this lake. |
The beautiful Takachiho Gorge near Mt. Aso, with its columnar basalt.
VolcanoWorld wishes to thank Mike Lyvers for generously sharing his photographs.
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