Fig. 5
From: Creating a digital database of tephra fallout distribution and frequency in Japan
Relationship between tephra fallout events and VEI. (a) Number of prefectural offices where tephra fallout events of > 0 mm were observed with different VEIs for the past ca 330 ka. (b) Percentage of eruptions where tephra fallout events of > 0 mm were observed anywhere in the 47 prefectural offices with different VEIs for the past ca 330 ka (Nobs) compared to the total number of eruptions in each VEI (Ntotal)