Which mechanism intensifies volcanic eruptions when magma interacts with shallow groundwater systems?

💡 Explanation

When magma interacts with shallow groundwater, phreatomagmatic explosions occur because the rapid heating of water generates steam, which expands violently, fragmenting the magma. Therefore phreatomagmatic explosions intensify eruptions, rather than lava flows, degassing, or pyroclastic surges which involve different volcanic processes.

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