by Rachel Oakley in New Photography on Thursday 17 April 2014

These amazing images by Olivier Grunewald show the bright blue glow of several volcanoes located within the 20km wide Ijen Caldera in East Java, Indonesia. At night, the hot gases of the volcanoes ‘burn to emit an eerie blue glow that is unique to Kawah Ijen. The gases emerge from the cracks in the volcano at high pressure and temperature, up to 600C, and when they come in contact with the air, they ignite, sending flames up to 16 feet high’.

Via Amusing Planet