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A recent issue of Volcano Watch looked at what the level of the lava lake within Halema‘uma‘u can tell us about how Kilauea works and the hazards it poses. The level varies continuously and in concert with both deep and shallow changes in the magma plumbing system feeding the lava lake. One way of thinking about it is that the lava lake acts as a pressure gauge on the magma chamber to which it is connected.

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