“Earthquake prediction map” to improve color usage Easy to see for people with color blindness 25:24 on August 25
The government's Earthquake Research Promotion Headquarters has decided to improve the use of color on the map that predicts the probability of occurrence of earthquakes and seismic intensity in the future so that people with color vision disabilities can easily see.
The Seismic Research Promotion Headquarters has established the “National Seismic Hazard Prediction Map” that shows the probability of earthquake occurrence and the strength of shaking predicted nationwide, as well as the probability that an earthquake will occur within the next 30 years on major active faults. The maps etc. that have been ranked are published.
Previously, green and light green were used for seismic intensity of less than 5 and reddish colors were used for seismic intensity of less than 6; however, for people who have difficulty distinguishing red and green, the danger level may not be accurately communicated. It means that there is sex.
For this reason, we decided not to use green in the future, and also decided not to use a gradation display where the color changes continuously.
Also, depending on the type of map, “black”, which was used for both high and low risk levels, will no longer be used. Nine levels of color are standardized to “light gray” and reflected in future maps.
Professor Nobuo Fukuwa of Nagoya University, Chairman of the Policy Committee for Earthquake Research Promotion Headquarters, said, “In the face of increasing disasters, the importance of using information correctly is increasing. I want to work on it. "