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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Temporal change in rock-magnetic properties of volcanic ashes ejected during a 1-year eruption event: a case study on the Aso Nakadake 2019–2020 eruption

Fig. 4

Hysteresis parameters (Mrs/Ms) and the median destructive temperature from the thermomagnetic curve. Tm is the temperature given by Ms(Tm) = 0.5 Ms0, where Ms(T) is the saturation magnetization Ms at temperature T and Ms0 is the Ms value at room temperature. Gray triangles denote Mrs/Ms and blue circles indicate Tm. Red squares indicate the day when the volcanic glow was observed. High Mrs/Ms values indicate the predominance of SD grains. Low Tm values indicate higher titanium contents

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