Fig. 15

Earthquake hypocentres in a swathe at right-angles to the Finisterre Range of mainland Papua New Guinea, showing extensional and compressional axes (Pegler et al., 1995). See Fig. 14 for location. Tomography tells much the same story and suggests that the south dipping subduction phase was either very brief, very slow, or very recent, since the tomographic expression of the slab extends to little more than 200 km (see Hall & Spakman, 2003, Fig. 9e)