Fig. 8
From: A possible mechanism for spontaneous cyclic back-arc spreading
a Seismic tomography image of the Tonga-Kermadec arc (van de Lagemaat et al. 2018). b Seismic tomography image of the Calabrian arc (Piromallo and Morelli 2003). c, d Estimated evolution of slab geometry beneath the Tonga-Kermadec arc (c) and the Calabrian arc (d). SFB = The South Fiji Basin, LB = The Law Basin, HT = The Havre Trough, LPB = The Liguro–Provençal Basin, TB = The Tyrrhenian Basin