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Fig. 14 | Earth, Planets and Space

Fig. 14

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. 14

Relationship between initial flow velocity of PDC (u 0) and initial depth-averaged particle concentration (C 0) for 2–4φ particles for three major PDC lobes (lobes 1, 2, and 3), calculated based on Bonnecaze and Lister (1999). Arrows indicate estimated velocity using C 0 that is calculated from observations of duration and thickness

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