Volcanic eruptions in dreams usually represent our erupting emotions. Feelings that you may be harboring during the day might take the form of a volcanic eruption in a dream state.
The unconscious psyche might be releasing positive or negative feelings in a safety of a dream. (E.g. Strong sexual feelings, passion, anger, rage, and fear.) Superstition-based dream interpretations say that poring lava is a warning about poor health. ... The Bedside Dream Dictionary
Drives repressed and drives released, stress or stress reduction. This implies a “test by fire.” What is innermost comes to the surface. It might express a fantasy of merging in a relationship, or fusion of different parts of the Self in a developing personality. Also, what was hard is made to flow again.... Little Giant Encyclopedia
To dream of a Volcano foretells great disagreements, family jars, and lovers’ quarrels.
To a man of commerce it portends dishonest servants, and a robbery or some sad convulsion.
To lovers it is a sign that all deceit, intrigue, base designs, on one side or the other will be exploded, and the designer will be branded with the contempt and execration so justly deserved.... Mystic Dream Book
A volcano is representative of spiritual deeply held passion. This can sometimes erupt with frightening results, if we do not learn to express ourselves properly. Frustration often gives rise to the image of an active volcano.... Dream Meanings of Versatile
Material aspects: The image of a volcano in dreams is a very telling one, partly because of its unpredictability.
To dream of a volcano being extinct can indicate either that we have ‘killed off ’ our passions, or that a difficult situation has come to an end. This may be one that has been around for some time.... Dream Meanings of Versatile