National Research Institute for Earth Science and Disaster Resilience (NIED) is conducting research on building a database of strong-motion observation records as a common infrastructure and its use, such as seismic hazard assessment.
The ”Strong Ground Motion Flat File 2023 version” associates strong-motion indexes of K-NET and KiK-net records by the end of 2023 with source parameters from Japan Meteorological Agency and F-net, NIED, and site parameters from PS logging data, and the latest subsurface structures data from Japan Seismic Hazard Information Station, J-SHIS.
Information
- The source files (source_schema.tsv) for the 2023 and Preliminary version of the flat file were corrected, because there was an error in associating the momen tensor solutions from F-net with the JMA origin time for sources after 2022. (2024/09/20)
Terms of Use
Please comply with the Terms of Use when using data obtained from this page.
Download
The flat file is a text file that describes records of the strong-motion database in TSV format. For detail, please see the flat file format definition document. The analysis tool for Strong ground motion flat file is a command line tool works on Linux to search and extract records in the flat files.
See here (in Japanese) for change history.
2023 version
| File name | Contents | Size | Update date |
|---|---|---|---|
| flatfile-v2023r1.zip | Flat file including all data | 1.9GB | 2024-09-20 |
| flatfile_sub1-v2023r1.zip | Flat file including records with magnitude 5 or greater, and shortest fault distance of 300km or less, excluding columns RotD000, RotD025, and Rotd075. | 263MB | 2024-09-20 |
| flatfile_sub2-v2023r1.zip | Flat file excluding columns RotD000, RotD025, and RotD075 | 995MB | 2024-09-20 |
| doc-v1.0.0.pdf | Flat file format definition document (in Japanese) | 549KB | 2023-04-26 |
| tool-v1.0.0.zip | Flat file analyze tool, manual (in Japanese) | 745KB | 2023-04-26 |
Preliminary version
| File name | Contents | Size | Update date |
|---|---|---|---|
| flatfile-v1.0.1.zip | Flat file including all data | 1.8GB | 2024-09-20 |
| flatfile_sub1-v1.0.1.zip | Flat file including records with magnitude 5 or greater, and shortest fault distance of 300km or less, excluding columns RotD000, RotD025, and Rotd075. | 255MB | 2024-09-20 |
| flatfile_sub2-v1.0.1.zip | Flat file excluding columns RotD000, RotD025, and RotD075 | 963MB | 2024-09-20 |
| doc-v1.0.0.pdf | Flat file format definition document (in Japanese) | 549KB | 2023-04-26 |
| tool-v1.0.0.zip | Flat file analyze tool, manual (in Japanese) | 745KB | 2023-04-26 |
Reference
- Morikawa, N., A. Iwaki, H. Fujiwara, S. Akiyama, T. Maeda, H. Kubo, S. Aoi, T. Hayakawa, M. Takahashi, K. Kato, Y. Tomozawa, F. Suzuki, K. Motoki, T. Iida, T. Sato, T. Ishii, J. Miyakoshi, N. Shimazu, A. Oana, T. Hayashi, N. Kishida, T. Okazaki, H. Si, H. Matsuyama and S. Midorikawa (2024): Flat file of K-NET and KiK-net strong-motion records, Proceedings in the 18th World Conference on Earthquake Engineering.
Contact
Questions, opinions, and requests regarding the flat file, contact to following e-mail address.
Questions regarding the original data used to create the flat file, please contact the respective data management organization.