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Fig. 1 | Earth, Planets and Space

Fig. 1

From: Magnetic petrology of pumice fall deposits of the 1783 eruption of Asama volcano, Japan

Fig. 1

a Topographic map of Asama volcano consisting of Kurofu volcano, Maekake volcano, and Hotokeiwa volcano. The star in the index map upper left shows the location of the Asama volcano. The distribution of the 1783 eruptive products (Aramaki 1993) is shown. Yellow lines indicate 1 cm isopach of the pumice fall deposits from the 1783 eruption (Yasui and Koyaguchi 2004). AVO Asama volcano observatory. b Photograph showing the occurrence of the ESE pumice fall deposits of the eruption. Letters shown on the photograph indicate the sampled units for this study. The distinctive ash fall deposits shown in Yasui and Koyaguchi (2004) are also shown. The scale bar on the right is 1 m long. c Representative halved sections of pumice samples of various sizes. Pumice samples with the same size as or smaller than the smallest one in this figure were used for this study. White dashed lines indicate broken-out sections of the large samples. Pinkish oxidized parts are surrounded by red dashed line. d Histograms showing the frequency of magnitude of MS of pumice fall deposits. The stars in the diagrams represent the average values. e Histograms showing SiO2 content of groundmass glass composition of each unit. This is rewritten from Fig. 3 in Yasui (2016) with permission from the Institute of Natural Sciences, College of Humanities and Sciences, Nihon University

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