A reservoir of magma within the earth's crust beneath a volcano.
（火山下地壳中的）岩浆室
Example sentencesExamples
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 gist of the finding is that under the earth, the magma chambers do not consist of molten magma alone, but solid crystals are also found there.
The size and depth of these magma chambers can be determined by mapping the earthquake activity around them.
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.
The frequent but low-level activity of Vesuvius in recent centuries has relieved the build-up of pressure in the magma chamber.