Frustrated passengers remain stranded at airports across Australia, New Zealand and South America as volcanic ash continues to cause disruptions.

Tuesday saw Argentinean officials opt out of a previous plan to reopen several of the nation’s busiest airports –including both Aeroparque and Ezieza in Buenos Aires- when conditions did not improve as officials had hoped.

Meanwhile, some flights in Australia have resumed service after a green light from the country’s volcanic ash advisory authorities. Virgin is operating adjusted schedules via routes designed to avoid ash-affected airspace whilst Jetstar and Qantas remain still due to a company policy that all flights must stay grounded whenever there is any presence of volcanic ash.

Colin Lippiat, speaking on behalf of Virgin, said to the AFP that the the carrier was utilising a dedicated team of professionals to adjust operations in volcanic ash, which he said included a member from the Australian Bureau of Meteorology.

The news comes more than a week after the initial eruption of Chile’s Puheyeu-Cordon Caulle volcanic range on the 4th of June. The volcano is about 500 miles (800 kilometres) from Santiago and continues to send smoke and ash into atmosphere. Scientists have said its difficult to say when the eruption event will conclude.