Fig. 3From: Severe weather disasters to epidemics in China during low and high solar activities from 1 to 1911 Common EraProportions of the epidemic occurrences in the overall, costal, inland, Northern, and Southern areas in each solar activity periods. The proportion is computed by epidemic year counts divided by the year counts of the period. The proportion of LSA (blue bars) and HSA (red bars) periods are denotedBack to article page