Abstract
We report electric potential gradient measurements carried out at Sakurajima volcano in Japan during: (1) explosions which generated ash plumes, (2) steam explosions which produced plumes of condensing gases, and (3) periods of ashfall and plume-induced acid rainfall. Sequential positive and negative deviations occurred during explosions which generated ash plumes. However, no deflections from background were found during steam explosions. During periods of ashfall negative electric potential gradients were observed, while positive potential gradients occurred during fallout of plume-induced acid rain from the same eruption. These results suggest that a dipole arrangement of charge develops within plumes such that positive charges dominate in the volcanic gas-rich top and negative charges in the following ash-rich part of the plume. The charge polarity may be reversed for other volcanoes (Hatakeyama and Uchikawa 1952). We suggest that charge is generated by fracto-emission (Donaldson et al. 1988) processes probably during magma fragmentation within the vent, rather than by frictional effects within the plume.
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References
Anderson R, Bjornsson S, Blanchard DC, Gathman S, Hughes J, Jonasson S, Moore CB, Survilas HJ, Vonnegut B (1965) Electricity in volcanic clouds. Science 148:1179–1189
Carey SN, Sigurdsson H (1982) Influence of particle aggregation on deposition of distal tephra from the May 18, 1980, eruption of Mount St. Helens volcano. J Geophys Res 87:7061–7072
Chalmers JA (1967) Atmospheric electricity. Pergamon Press, London, pp 515
Chubb JN (1990) Two new designs of ‘field mill’ type fieldmeters not requiring earthing of rotating chopper. IEEE Transactions on Industry Applications 26:1178–1181
Crozier WD (1964) The electric field of a New Mexico dust devil. J Geophys Res 69:5427–5429
Donaldson EE, Dickinson JT, Bhattacharya SK (1988) Production and properties of ejecta released by fracture of materials. J Adhesion 25:281–302
Freier GD (1960) The electric field of a large dust devil. J Geophys Res 65:3504
Gilbert JS, Lane SJ, Sparks RSJ, Koyaguchi T (1991) Charge measurements on particle fallout from a volcanic plume. Nature 349:598–600
Harris DM, Rose WI, Roe R, Thompson MR (1981) Radar observations of ash eruptions. US Geol Surv Prof Pap 1250:201–207
Hatakeyama H (1958) On the disturbance of the atmospheric electric field caused by the smoke-cloud of the volcano Asamayama. Pap Met Geophys Tokyo 8:302–316
Hatakeyama H, Uchikawa K (1952) On the disturbance of the atmospheric potential gradient caused by the eruption-smoke of the volcano Aso. Pap Met Geophys Tokyo 2:85–89
Iribarne JV, Cho H-R (1980) Atmospheric physics. D Reidel Publishing Company, Holland, pp 212
Ishihara KJ (1985) Dynamical analysis of volcanic explosion. J Geodynamics 3:327–349
Ishihara KJ (1990) Pressure sources and induced ground deformation associated with explosive eruptions at an andesitic volcano: Sakurajima volcano, Japan. In: Ryan MP (ed) Magma transport and storage. John Wiley and Sons, Chichester, pp 335–356
Kamo K, Ishihara K (1989) A preliminary experiment on automated judgment of the stages of eruptive activity using tiltmeter records at Sakurajima, Japan. In: Latter JH (ed) Volcanic hazards. Springer-Verlag, Berlin, pp 585–598
Whitlock WS, Chalmers JA (1956) Short period variations in the atmospheric electric potential gradient. Quart J R Met Soc 82:325–326
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Lane, S.J., Gilbert, J.S. Electric potential gradient changes during explosive activity at Sakurajima volcano, Japan. Bull Volcanol 54, 590–594 (1992). https://doi.org/10.1007/BF00569942
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DOI: https://doi.org/10.1007/BF00569942