A volcano puts on a show and an audience gathers to watch it.
Braving the heat, onlookers stood along the edge of the crater as Mount Bromo spewed ash on Tuesday near the city of Probolinggo, situated on Indonesia's coast east of Jakarta.
The country shut an airport in East Java province on Monday as the ash endangered flights, said an official cited by Xinhua news agency.
All activities at Abdul Rachman Saleh Airport in Malang district were halted, from 11am on Monday, Jakarta time, until 9am on Tuesday, said a spokesman for the national disaster management agency, Dr Sutopo Purwo Nugroho.
The 3,829m-tall volcano spewed a column of ash up to 1,200m into the sky on Monday, he told Xinhua, adding that tourists had been banned from entering the area 1km from the crater.
Mount Bromo is one of Indonesia's 129 active volcanoes.
Its eruptions paralysed tourism activity in the province and nearby areas in 2010 and forced airlines to ground their planes in 2011.