An undersea volcanic eruption in the Tongan archipelago has sunk one island and created another three times larger, according to a report by geologists released Thursday. Taaniela Kula, of the Tonga Geological Service, said the new Lateiki island is estimated to be about 100 metres (110 yards) wide and 400 metres long, and is situated about 120 metres west of its submerged predecessor.

Mount Etna in southern-Italy has burst into life, spitting molten lava high into sky, though cloud cover Saturday ruined the view for those brave enough to venture-up the flanks of Europe's highest-volcano. The INGV said there was "lively-spattering" as fire and hot ash spewed-high into sky in an eruption which began Thursday and had slowed slightly by Saturday but still posed risk to climbers.

Indonesia on Thursday raised the danger alert level for a volcano that sparked a killer tsunami at the weekend, after previously warning that fresh activity at the crater threatened to trigger another deadly wave. Authorities also widened a no-go zone around Anak Krakatoa to five kilometres (three miles) up from a previous two kilometres and warned shell-shocked residents to stay away from the coast.