"John Frum prophesied the occurrence of a cataclysm in which Tanna would become flat, the volcanic mountains would fall and fill the river-beds to form fertile plains, and Tanna would be joined to the neighbouring islands of Eromanga and Aneityum to form a new island. Then John Frum would reveal himself, bringing in a reign of bliss, the natives would get back their youth and there would be no sickness; there would be no need to care for gardens, trees or pigs. The Whites would go; John Frum would set up schools to replace mission schools, and would pay chiefs and teachers." - Peter Worsley, "The Trumpet Shall Sound"
Let Us Persevere in What We Have Resolved Before We Forget
John Frum predicted a catastrophic event where Tanna's landscape would dramatically change, with volcanic mountains collapsing and filling riverbeds to create lush plains, ultimately merging Tanna with neighboring islands Eromanga and others.