Page 295 - Caldera Volcanism Analysis, Modelling and Response

270 J. Martı ´ et al.

Figure 14 Plane view of hypocentre location of earthquakes recorded at Rabaul between
1971 and early 1992: (a) below 2 km and (b) above 2 km, (c) and (d) TwoWNW-ESE sectional
views A--Au and B--Bu through the centre and a few kilometres to the south of the centre of the
seismic annulus, respectively. North is up. Note in (c) a‘complexity’at B2 km depth, coinciding
with the area where the deeper structure overlaps or merges with the shallower structure
(modi¢ed after Saunders, 2001).