Linear Relationship between Energy and Pressure of Volcanic Explosions

Abstract

EARLY investigations on the velocity of bombs and the gas pressure of single volcanic explosions by Matuzawa1–3 led to a means of determining gas pressures which have been generally accepted and used by volcanologists. Matuzawa stated1 that the initial discharge velocity of volcanic explosions depended primarily on the gas pressure, which could be calculated from the dynamic pressure relationship of Bernouilli's equation: where the gas pressure, P, represents the pressure difference between the interior and exterior of the vent, ρ is the density of the mass of fragments plugging the vent, and v is the discharge velocity of volcanic bombs.

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References

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    Matuzawa, T., Bull. Earthquake Res. Inst., Tokyo, 11, 347 (1933).

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    Gorshkov, G. S., Bull. Volcanologique, 23, 141 (1960).

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RICHARDS, A. Linear Relationship between Energy and Pressure of Volcanic Explosions. Nature 207, 1382–1383 (1965). https://doi.org/10.1038/2071382b0

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