BUENOS AIRES (AFP) - The eruption of Chile's volcano entered a second week, spewing volcanic ash that has disrupted air travel from S.America to Australia. A flight carrying UN Chief Ban to Buenos Aires was diverted to Cordoba because of the ash clouds blowing out of the Andes. Meanwhile, Hillary Clinton cut short a trip to Africa to avoid another ash cloud from a volcanic eruption in Eritrea, a US official said. Thousands of travellers were stranded Monday after volcanic eruptions prompted Australian airlines to ground some domestic and international services for a second day.