Indonesian volcano a quarter of previous size following deadly eruption

Huge chunks of Anak Krakatoa slid into the sea

Before-and-After Pics Show Dramatic Collapse Of Tsunami-Causing Volcano In Indonesia

Heavy rains and high seas have hampered the search for victims.

Indonesia's Anak Krakatau volcano, whose eruption and collapse last week caused a tsunami that claimed the lives of more than 420 people, is now only about a quarter of the size it was before its outburst, scientists say.

Satellite photos aren't available because of cloud cover but radar images from a Japan Aerospace Exploration Agency satellite taken before and after the eruption show the volcano's southwestern flank has disappeared.

The estimates were made based on pictures from several radar satellites including the European Space Agency's Sentinel-1.

This year, Indonesia has suffered its worst annual death toll form disasters in more than a decade. It said 23 are missing and more than 40,000 displaced. A few days later, the nearby volcano Soputan erupted. "The challenge now is to interpret what might be happening on the volcano, and what might happen next", he writes.

Before-and-After Pics Show Dramatic Collapse Of Tsunami-Causing Volcano In Indonesia
Satellite images show Anak Krakatau volcano decimated by eruptions

A no-go zone around rumbling Anak Krakatoa has been widened to five kilometres (three miles) - up from a previous two kilometres - with residents warned to stay away from the coast.

JAXA's post-eruption image shows concentric waves radiating from the island, which experts say is caused by its ongoing eruptions.

Anak Krakatau, which means "Child of Krakatoa", emerged around 1928 in the crater left by its forerunner, the infamous Krakatoa volcano. "It is possible that the new shape of the volcano also allows for a slow movement of volcanic material into the sea and into the caldera formed by the 1883 eruption". The tsunami was triggered by a volcanic eruption which caused a chunk of Anak Krakatau to slide into the ocean and triggered an underwater landslide. "We only have the early warning system when there is an quake before the tsunami", he said.

Sutopo Purwo Nugroho, national disaster agency spokesman, said: 'There is a danger of more eruptions.

Sulphur and thick ash from the continually erupting volcano has blanketed the island. On Thursday, the BBC reports that Indonesian authorities also raised the volcano alert level to the second highest option, due to the activity at Anak Krakatau and diverted all flights from the volcano exclusion zone.

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