Field Survey on 2006 Java Tsunami

This report is to summarize the result of our field survey for 2006 Java Tsunami. Major conclusions are as follows; 1) The area from 108.0 E to the eastward was affected by the tsunami with the wave height of 3-5 m. 2) Tsunami run-up and inundation around tombolo or sand dune are investigated. Some topographical or artificial factors in tsunami disasters are found out: tombolo, the places where river mouths cut across sand dunes, roads or paths leading to coast lines, and drifting fishery boats. 3) There is the area in oval shape with the water depth of over 3000 m off the south cost of Java Island. Tsunami numerical simulation proves that the tsunami refracts toward north direction when it propagates out of this area. Such bathymetry and refraction can cause the tsunami to reach to the distant area like Yogyakarta.