Manila, Philippine, Cotabato, Halmahera, and Sulawesi slabs

Here, five slabs (the Manila, Philippine, Cotabato, Halmahera, and Sulawesi slabs, from north to south) interact with one another. The Halmahera slab is an inverted U-shaped subduction zone that is completely buried and has no surface expression. It underlies the Cotabato and Sulawesi slabs on its western limb and abuts or overlies the Philippine slab on its eastern limb.