On the Disturbance of the Atmospheric Potential Gradient Caused by the Eruption Smoke of the Volcano Aso

[摘要] The disturbance of the atmospheric potential gradient, caused by the eruption smoke of the Volcano Aso and observed in the neighbourhood of the crater, was positive when the volcanic ashes were falling. The negative disturbance was observed in a short duration when the tip of the smoke reached the zenith of the observing spot. The electrification of ashes caused by the mutual collision was investigated in the laboratory and it was found that the larger particle got the positive electricity and the smaller particle the negative.

[学科分类] 大气科学