[SCG58-02] Seismic energy estimation for shallow tremors in the Nankai trough and Japan trench
Keywords:Shallow slow earthquakes, seismic energy, Scaled energy
Yabe et al. (2019, doi: 10.1029/2018JB016815) estimated seismic energy of shallow tectonic tremors in Kumano region off Kii Peninsula. We applied the same method to the entire Nankai trough (DONET) and Japan trench (S-net). In the Nankai trough, we refer shallow VLFE catalog by Nakano et al. (2018, doi:10.1038/s41467-018-03431-5) and estimate seismic energy of shallow tremors accompanying VLFEs. In the Japan trench, we refer tremor catalog by Nishikawa et al. (2019, doi:10.1126/science.aax5618) and estimate seismic energy of those tremors. In addition, we also estimate seismic moment of VLFEs accompanying tectonic tremors with large seismic energy, which can be observed using onshore F-net stations. We will report the spatial variations of the estimated seismic energy of shallow tremors and the scaled energy of shallow slow earthquakes.
This study used data from NIED F-net (doi:10.17598/NIED.0005), DONET (doi:10.17598/NIED.0008), and S-net (doi:10.17598/NIED.0007).