Looks like this[1] is it, called "Central Weather Administration seismic intensity scale". There are few more similar standards around the world[2]. Looks like

Looks like this[1] is it, called "Central Weather Administration seismic intensity scale". There are few more similar standards around the world[2]. Looks like Taiwanese version is indeed related to Japanese standard. From [3]: > 臺灣的地震觀測始於日治時期，2000年8月之前的震度分級是沿用日本1936至1948年所使用的震度分級， My crudest roughly-letter-to-letter translation: > Taiwan's earthquake observation started during Japanese ruling period, Aug 2000 and before's intensity classification thereby following Japanese 1936 to 1948 -at employed intensity classification, 1: https://en.wikipedia.org/wiki/Central_Weather_Administration_seismic_intensity_scale https://en.wikipedia.org/wiki/Central_Weather_Administration... 2: https://en.wikipedia.org/wiki/Seismic_intensity_scales https://en.wikipedia.org/wiki/Seismic_intensity_scales 3: https://zh.wikipedia.org/wiki/%E4%BA%A4%E9%80%9A%E9%83%A8%E4%B8%AD%E5%A4%AE%E6%B0%A3%E8%B1%A1%E7%BD%B2%E5%9C%B0%E9%9C%87%E9%9C%87%E5%BA%A6%E5%88%86%E7%B4%9A https://zh.wikipedia.org/wiki/%E4%BA%A4%E9%80%9A%E9%83%A8%E4...