Leaders to discuss €1.5bn aid operation
They will also discuss an ambitious plan to set up an Indian Ocean tsunami warning system.
Asian leaders including Japanese Prime Minister Junichiro Koizumi - whose nation's $500 million (€376.7m) pledge makes it the biggest single country contributor so far - are to attend the summit, along with US Secretary of State Colin Powell, UN Secretary-General Kofi Annan, World Bank President James Wolfensohn and top European Union officials.