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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

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. 2

Results of hysteresis measurement. a, b Examples of hysteresis loops. The red solid line is the measured hysteresis loop (raw data). The blue dashed line is the corrected loop for the effect of paramagnetic minerals. c Ratio of the saturation remanent magnetization to saturation magnetization (Mrs/Ms) vs. coercivity (Bc). d Mrs/Ms vs. coercivity of remanence to coercivity (Bcr/Bc). The upper left in the plot is single-domain (SD) region, while the lower right is closer to the multi-domain (MD) grain size. The two dotted lines are the SD–superparamagnetic (SP) mixing line (top) and the MD–SD mixing line (bottom) (Dunlop 2002a, b)

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