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Unformatted text preview: magma chambers below the surface are sites of temporary lava storage magma chambers can be several kilometers below volcanoes *cascadia subduction and the cascades x-section across cascadia subduction zone *distribution of seismicity under MSH-past decade *making bubbles in magmas decompression of magma during ascent through magma conduits crystallization of magma in a chamber *decompression of magma in conduits magma chambers become periodically replenishes by intrusion of new magma the new magma forces magma rise up the conduit where it becomes saturated in water and bubbles form, causing a violent eruption 17/04/2008 15:34:00 17/04/2008 15:34:00...
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- Winter '08