Fig. 4

A map showing the distribution and size of living massive corals of Porites sp. (see Table 1 for the list) and coral tsunami boulders at Ibaruma reef (after Goto et al. 2010b). Aerial photographs were provided by the Ministry of Land, Infrastructure, Transport and Tourism, Government of Japan (1977 photograph). The weight of living corals was estimated based on the assumption of ellipsoidal shape with a wet density of 1.68 g/cm³