51.   The New Zealand authorities closed airspace over Mount Ruapehu on Monday and issued a high alert warning, fearing the volcano was about to stage a large-scale eruption.

52.   The two volcanos are in the same mountain range in the east of the DRC.

53.   Undersea volcanoes are common in the Tongan region which sits astride the Tonga Trench, a long canyon which has some of the deepest waters in the world.

54.   While the weather was clear, the volcano was not visible from Yogyakarta as it was shrouded in grey clouds.

55.   The nationalities of the dead, injured and missing were not known, but the volcano is popular with tourists from Ecuador and abroad.