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.