**6. Acknowledgment**

QuickBird images are owned by DigitalGlobe, Inc. and IKONOS images are operated by GeoEye. ASTER and PALSAR images are owned by METI/NASA and METI/JAXA, respectively, and both are processed by GEO Grid, AIST. JERS-1/SAR image is also owned by METI/JAXA. TerraSAR-X image is the property of Infoterra GmbH and distributed by PASCO Corporation. We express our deep appreciation to the Industrial Technology Research Grant Program in 2008 (Project ID: 08E52010a) from the New Energy and Industrial Technology Development Organization (NEDO), the Willis Research Network (WRN) under the Pan-Asian/Oceanian tsunami risk modelling and mapping project and the Ministry of Education, Culture, Sports, Science and Technology (MEXT) for the financial support for this study.
