Indonesia tsunami: fresh alert for Anak Krakatau volcano as eruptions continue

Indonesia tsunami: fresh alert for Anak Krakatau volcano as eruptions continue

Indonesian authorities have warned residents to stay away from beaches along the Sunda Strait, saying extreme weather and volcanic activity could generate another devastating tsunami in areas where more than 420 people were killed over the weekend.

AirNav Indonesia, the country's traffic control agency, said it was closing flight routes to avoid the volcanic ash.

"The PVMBG of the ESDM Ministry of Gelology has upgraded the status of Gunung Anak Krakatau from Waspada (Level II) to Alert (Level III), with the danger zone extended from 2 kilometres to 5 kilometres".

An moderate frequency quake on Wednesday hit Indonesia which was recently devastated by a deadly volcano-triggered tsunami in Sunda Strait that claimed lives of more than 400 people.

The death toll from the tsunami that hit coastal areas of Indonesia's Java and Sumatra islands has reached 429, with nearly 1500 injured and 154 missing, an official says.

But the head of Indonesia's Meteorology, Climatology and Geophysics Agency, Dwikorita Karnawati, said the tsunami was likely caused by Krakatau's volcanic activity and so could not have been picked up by the agency's sensors, which monitor conventional earthquakes responsible for more than 90 percent of Indonesia's tsunamis.

The resulting tsunami hit the islands of Java and Sumatra around 9:30 p.m. without warning, with residents saying the waves were more than 10 feet high in some areas.

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"I'm scared my son is dead, but if I keep my faith in God maybe he could have been swept away somewhere and is still alive", he said.

"On Wednesday morning until late in the afternoon, medium to heavy rainfall is predicted", she said.

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Indonesia has issued a state of emergency until January 4, Sutopo Purwo Nugroho, representative of the country's national disaster mitigation agency said.

It was a sharp contrast to the disaster that struck 14 years ago off the western coast of Indonesia's Sumatra island.

The volcano-triggered tsunami is thought to have killed more than 430 people and caused significant damage to coastal areas, damaging hundreds of homes and businesses including a number of hotels.

"We are still traumatised, especially when we hear Krakatau [rumbling]", Nursanah, who was herself rescued from a forest, told BBC News Indonesia.

2004: A massive 9.1 magnitude quake on the western coast of Indonesia's Aceh province in northern Sumatra on December 26, 2004 triggered a tsunami that struck 14 countries, killing 226,000 people along the Indian Ocean coastline; more than half of the killings were in Aceh.

"Saddened by the loss of lives and destruction in Indonesia caused by tsunami".

More than 21,000 people have been displaced from their homes and heavy equipment is urgently needed in the Sumur subdistrict near Ujung Kulon National Park to help get aid flowing and reach people who may be injured or trapped, said Nugroho.

Radar data from satellites, converted into images, shows the Anak Krakatau volcano is dramatically smaller following Saturday's eruption.

"The challenge now is to interpret what might be happening on the volcano, and what might happen next", he said.

Indonesia's vast archipelago, which sits on the Pacific "Ring of Fire", has suffered its worst annual death toll from disasters in more than a decade.