Source: The Great Interpretation of Dreams (Ibn Sirin)
(By analogy with fire) A volcano in a dream indicates great strife and anger from the ruler. The eruption of lava from it indicates a general affliction and illness.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
A volcano indicates an angry man with authority. Its eruption indicates war or great strife. Escaping from it is salvation from hardship.
Source: Signs in the Science of Expressions (Ibn Shaheen)
A volcano is interpreted as torment. Whoever sees himself near it is in danger.