Fig. 3

Distribution of the pyroclastic density current on May 29, 2015. The summit crater of Shindake is indicated by “S.” The area covered by the PDC is subdivided into “Zone a” to “Zone e” based on the thickness of the deposit and the degree of damage to the vegetation. The broken line signed with “ic” is the approximate limit of the dense distribution of impact craters (more than 10 craters per 100 × 100 m area based on the aerial photographs). Blue broken lines show the area of the photographs shown in Fig. 4. Blue circles show the location of the photographs shown in Fig. 5. Diamond symbols indicate locations of the representative outcrops shown in Fig. 6