Definition of magma chamber in English:

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magma chamber

noun

A reservoir of magma within the earth’s crust beneath a volcano.
Example sentences
  • When magma moves beneath a volcano, such as when the magma chamber fills prior to an eruption, there is swelling of the volcanic cone above.
  • It could also be that magma is somehow able to pass through the volcano without deforming it; or that the magma chamber is so deep that its deformations aren't visible at the surface.
  • The frequent but low-level activity of Vesuvius in recent centuries has relieved the build-up of pressure in the magma chamber.

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