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Earth, Planets and Space
Fig. 11 | Earth, Planets and Space

Fig. 11

From: Reconstruction of a phreatic eruption on 27 September 2014 at Ontake volcano, central Japan, based on proximal pyroclastic density current and fallout deposits

Fig. 11

Characterization of fallout tephra deposit distribution used in the volume and mass estimation. a Exponential fit with multiple segments on a log(mass per unit area) versus log(area) plot. b Power-law fit. c Weibull fit. Solid circles indicate observed data, and open circles in a indicate data from inaccessible proximal areas at the crater rim based on various assumptions. Red and green lines indicate fitting curves for case 1 (not using proximal data) and case 2 (using proximal data), respectively. Solid and broken lines in a, c indicate maximum and minimum estimates, respectively

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