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Fig. 3 | Journal of Applied Volcanology

Fig. 3

From: A quantitative approach to the 2014 Mt. Ontake volcanic eruption news coverage: understanding the information gap and the public response to the anniversary coverage

Fig. 3

a Network visualization of words contained in the articles belonging to Cluster 1. Nodes (words) with the highest betweenness centrality are darker on the graph. A node with a large betweenness centrality corresponds to the point through which the route passes many times when each node is connected by the shortest path (Kadoguchi 2015). Each node’s size (circle size) is proportional to its frequency. Links between words are created according to a cosine similarity greater than 0.50. Nodes are automatically arranged, and the superimpositions between nodes indicates a link. b Monthly variations in the percentage of information volume for Cluster 1. The solid, dashed, and dotted lines represent the information volume for national, regional, and local newspapers, respectively. It is noted that the information volume corresponded to the sum of characters of news articles in a month

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