In Korean tradition, dreaming of a volcano is read as inauspicious. It is most often tied to 전반, 가족.
A volcano is what was held down bursting out — suppressed feeling or conflict erupting. Lava cooling was read as the storm settling.
Tradition reads the symbol as an omen; psychology reads the same dream as a mirror of your present state. Describe your dream and both readings appear together. Interpret your dream