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Fig. 7 | Progress in Earth and Planetary Science

Fig. 7

From: Earthquake early warning: what does “seconds before a strong hit” mean?

Fig. 7

Probabilistic hazard map of ground motion for 30 years published in 2010. The original figures were downloaded from the website of the Headquarters for Earthquake Research Promotion: (https://www.jishin.go.jp/evaluation/seismic_hazard_map/shm_report/shm_report_2010/. https://www.jishin.go.jp/main/chousa/10_yosokuchizu/ka_bunpu.pdf). This site is in Japanese only; a corresponding site in English is https://www.jishin.go.jp/main/index-e.html that shows only the 2007 version and is not updated. There are areas along the Pacific coasts from Kanto to Shikoku and northeastern Hokkaido where ground shaking of IJMA6− or greater was predicted to occur in the coming 30 years with a probability of more than 6% (left). Probabilities of 6% or higher for ground shaking of IJMA6+ or greater were predicted only for narrow zones along the Itoigawa-Shizuoka Tectonic Line and the coast in Tonankai region, and for other small areas (right). Note that these hazard maps show low probabilities of less than 6% to most of the regions which were struck by strong ground shaking of IJMA6− and greater during the 2011 Tohoku-Oki and the 2016 Kumamoto earthquakes

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