South Java tsunami of 17th July 2006 : reconnaissance report

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Cousins, W.J.; Power, W.L.; Palmer, N.G.; Reese, S.; Tejakusuma, I.; Nugrahadi, S. 2006 South Java tsunami of 17th July 2006 : reconnaissance report. Lower Hutt, N.Z.: GNS Science. GNS Science report 2006/33 37 p.

Abstract: On 17th July 2006, about 200 km of the south coast of Java was inundated by a tsunami generated by an offshore earthquake of MW 7.7. The worst hit area was the resort town of Pangandaran, where water depths of up to 5 m caused destruction of 3000 buildings, killed 400 people and seriously injured a further 350. Early reports indicated shoreline wave heights of 3 to 5 m. Data on the impacts of tsunami of such heights are relevant to New Zealand because estimated 500-year wave heights for the most populated parts of New Zealand are in the range 2 to 6 m. Hence a joint New Zealand/Indonesian reconnaissance team visited the damage area with the aim of acquiring data for calibrating models used to estimate inundations, casualty rates and damage levels in New Zealand. Such data are in short supply internationally. The main tasks were (a) to measure ground elevations and inundation depths along multiple transects across affected areas, using specialised GPS-based surveying equipment, (b) to observe levels of damage to buildings, infrastructure and vegetation for various water depths along the transects, and (c) to obtain data on casualty rates. (auth)