Fig. 9
From: A review of shallow slow earthquakes along the Nankai Trough
Spatiotemporal change of subsurface structure associated with shallow slow earthquakes southeast off the Kii Peninsula (Tonegawa et al. 2022). a Spatiotemporal variations of scattering coefficient change (Δg), which is related to subsurface structure changes beneath DONET stations. Dashed blue boxes represent the regions of shallow SSEs detected by Araki et al. (2017). Purple and light-brown circles during Events 3 and 6 are shallow VLFEs (Nakano et al. 2018a; Takemura et al. 2022c). b temporal change in cross-correlation coefficient (CC) for KMC-node. Black and gray arrows represent the CC reductions observed around KMC-node and other regions. Pink regions represent the periods of shallow SSEs (Araki et al. 2017; Ariyoshi et al. 2021) and large shallow slow earthquake episode from December 2020. Gray regions are data gaps. The red star in b indicates the 2016 off Mie earthquake which was an Mw 6 interplate earthquake. Names of station-node are added in a