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Description
The v2021 model for Japan was based on the 2014 seismic hazard model issued by the Headquarters for Earthquake Research Promotion (HERP). The model is described by Fujiwara et al. (2009), Fujiwara et al. (2015), and Fujiwara et al. (2023). The v2025 model has been developed by the National Research Institute for Earth Science and Disaster Resilience (NIED) and will be publicly released at the end of 2025. The models have been translated from its original format into the OpenQuake (OQ) engine within a collaboration between the National Research Institute for Earth Science and Disaster Resilience (NIED) of Japan, and GEM.
How to cite this work
The v2025.0.0 model, by N. Morikawa and A.Iwaki, has not yet been published. The v2021 version of the model can be cited as follows: Fujiwara, H., Kawai, S., Aoi, S., Morikawa, N., Senna, S., Kudo, N., Ooi, M., Hao, K. X., Wakamatsu, K., Ishikawa, Y., Okumura, T., Ishii, T., Matsushima, S., Hayakawa, Y., Toyama, N. and Narita, A. (2009). Technical reports on national seismic hazard maps for Japan, Technical Note of the National Research Institute for Earth Science and Disaster Resilience, No. 336, 512 pp. Fujiwara, H., Morikawa, N., Kawai, S., Aoi, S., Senna, S., Maeda, T., Azuma, H., Hao, K. X., Iwaki, A., Wakamatsu, K., Imoto, M., Hasegawa, N., Okumura, T., Hayakawa, T., Takahashi, M. (2015). Improved seismic hazard assessment after the 2011 great East Japan earthquake,” Technical Note of the National Research Institute for Earth Science and Disaster Resilience, No. 399 Fujiwara, H., Morikawa, N., Maeda, T., Iwaki, A., Senna, S., Kawai, S., Azuma, H., Hao, X., Imoto, M., Wakamatsu, K., Miyakoshi, J., Morii, T., Shimazu, N., Takahashi, M. and Akatsuka, M. (2023). Improved seismic hazard assessment after the 2011 great East Japan earthquake (Part 2). Technical Note of the National Research Institute for Earth Science and Disaster Resilience, No. 489
Available Versions
The latest available version (v2021.0.0) translated from its original format into the OpenQuake engine by NIED and GEM can be requested by clicking on the "License Request", where a specific license will be provided, depending on the use case. Instead, the v2025.0.0 model can be requested from NIED (http://www.j- shis.bosai.go.jp/en)
License information
Currently, only the v2021 model is available under a restricted license that has to be tailored for each specific use case. Please click on "License Request". Those that are interested in the v2025.0.0 model should contact NIED.
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