RED-ACT: 0604 M6.1 Japan Torishima Kinkai Earthquake
RED-ACT Report
Real-time Earthquake Damage Assessment using City-scale Time-history analysis
June 04, M6.1 Japan Torishima Kinkai Earthquake
Research group of Xinzheng Lu at Tsinghua University (luxz@tsinghua.edu.cn)
First reported at 16:00, June 04, 2019 (Beijing Time, UTC +8)
Acknowledgments and Disclaimer
The authors are grateful for the data provided by K-NET and KiK-net. This analysis is for research only. The actual damage resulting from the earthquake should be determined according to the site investigation.
Scientific background of this report can be found at:
http://www.luxinzheng.net/software/Real-Time_Report.pdf
1. Introduction to the earthquake event
At 13:40 04 Jun 2019 (Local Time, UTC +9), an M 6.1 (JMA) earthquake occurred in Japan Torishima Kinka. The epicenter was located at 139.8 29.1, with a depth of 440.0 km.
2. Recorded ground motions
13 ground motions near to epicenter of this earthquake were analyzed. The names and locations of the stations can be found Table 1. The maximal recorded peak ground acceleration (PGA) is 2.6 cm/s/s. The corresponding response spectra in comparison with the design spectra specified in the Chinese Code for Seismic Design of Buildings are shown in Figure 1.
Figure 1 Response spectra of the recorded ground motions with maximal PGA
3. Damage analysis of the target region subjected to the recorded ground motions
Using the real-time ground motions obtained from the strong motion networks and the city-scale nonlinear time-history analysis (see the Appendix of this report), the damage ratios of buildings located in different places can be obtained. The building damage distribution and the human uncomfortableness distribution near to different stations is shown in Figure 2 and Figure 3, respectively. These outcomes can provide a reference for post-earthquake rescue work.
Figure 2 Damage ratio distribution of the buildings near to different stations
Figure 3 Human uncomfortableness distribution near to different stations
Scientific background of this report can be found at: http://www.luxinzheng.net/software/Real-Time_Report.pdf
Table 1 Names and locations of the strong motion stations
No.Station NameLongitudeLatitude
1CHB014140.04935.4769
2CHB017140.07635.2988
3CHB019139.83535.1105
4CHB020140.10235.1155
5FKS008140.56737.4363
6FKS013140.55637.09
7FKS017140.36937.2842
8FKS024140.13237.3957
9IBR005140.23736.3851
10SIT008139.74635.9829
11SIT010139.64835.9065
12TCG013140.02336.4368
13TCG014140.17436.545
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