“…Vertically driven SI is purely driven by gravity‐induced or density‐induced buoyancy, while horizontally driven SI is attributed to laterally driving forces that arise, e.g., from tectonic‐convection or mantle‐convection induced stresses (Bhattacharya et al., 2019; Crameri & Tackley, 2014, 2015; Crameri et al., 2020; Duretz et al., 2016; Faccenda et al., 2008; Guilmette et al., 2018; Maffione et al., 2015, 2017; Maunder et al., 2020; Plunder et al., 2020; Stern, 2004; Tetreault & Buiter, 2012; Van Hinsbergen et al., 2015; Vogt & Gerya, 2014; Zhou et al., 2020). Subduction polarity reversal (SPR), a type of horizontally forced SI, seems to be one of the more common SI mechanisms throughout the last 100 Myr (Almeida et al., 2022; Crameri et al., 2020; Zhang & Leng, 2021), e.g., in the Andaman Islands arc (Plunder et al., 2020), beneath Taiwan (Tao et al., 2020; von Hagke et al., 2016), and the Aleutian Arc (Vaes et al., 2019), the New Hebrides (Falvey, 1975), and the Solomon Island Arc (SIA; Mann & Taira, 2004). A typical SPR example is the San Cristobal Trench along the SIA, which may have resulted from the convergence of Ontong‐Java Plateau (OJP) and the SIA (Holm et al., 2016; Mann & Taira, 2004; Petterson et al., 1999; Stern, 2004; Tapster et al., 2014).…”