Fig. 6
From: A review of shallow slow earthquakes along the Nankai Trough
Laboratory friction experiments of sediments under the shallow plate boundary condition. a Temperature condition (black line) and illite content (gray line) along the bottom of underthrust sediment. b Variation in (a − b) values based on temperature conditions at various locations along the bottom of the accretionary prism. Circle dots; sediments off Kii peninsula (Okuda et al. 2023b); square and triangle: illite shale (den Hartog et al. 2012a; Phillips et al. 2020); and diamond: pure smectite (Mizutani et al. 2017). c Locations of very low frequency earthquakes (VLFE), slow slip events (SSE) (Sugioka et al. 2012; Araki et al. 2017; Ariyoshi et al. 2021), and 2016 Off-Mie earthquake (Wallace et al. 2016a; Nakano et al. 2018b; Takemura et al. 2020a)