The color of markers on the track is explained in symbols of typhoon track charts, and a red and yellow circle represents the 50-knot and 30-knot wind circle, respectively. The access heatmap is computed for the total number of page views per day, and the center of the circle is located at 00:00 UTC (09:00 JST) of the day. The maximum intensity of the color scape is 300,000 PV per day, and a larger intensity corresponds the color of pure red. For your information, attention ranking for each typhoon is available at Access Ranking, and access to the website is available at Access Analytics.