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・ Magma chamber ≒ Natural nuclear reactor ？
At present, principles and energy-sources to cause an eruption and the internal mechanism of magma chamber are not still understood in detail.
One hypothesis assumes that an eruption is originated in gas-pressure, but it's clearly insufficient to explain about causes of eruption.
And, other hypotheses assume that eruptions are triggered by heats generated from chemical reactions by various gases in volcanic paths or combustions of fossil fuels, however these theories also are insufficient to understand actual mechanisms ( in this case, it may be possible to know the total quantity of energy, but it's impossible to catch causes of momentary explosion ).
Because much of fossil fuels are found out even places except for volcanic regions.
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