Troitsky crater of Maly Semiachik volcano. The crater is filled with warm sulfuric acid
giving it a marvelous blue color. The faint grayish snow covered hill just above the two dark spots
is the Meso-Semiachik and the snow covered crest is the Paleo-Semiachik, two extinct volcanoes of the
same complex. At the horizon the Bolshoi Semiachik volcano.
[Maurice de Graaf]
