Japan warned tourists to keep away from popular Mount Aso after it began belching smoke and ash into the air, the latest eruption in one of the world's most volcanically active countries.
Iceland raised the aviation alert at its largest volcano, Bardarbunga, to maximum level red following a new eruption in a lava field nearby.
Peruvian authorities began evacuating 4,000 people Thursday from villages near a volcano that has seen significantly increased activity, spewing smoke and ash.
Residents have fled villages near Peru's Ubinas volcano, which this week began spitting out white hot chunks of rock, some as big as 30 centimeters (one foot) in diameter.
A volcano in central Ecuador spewed up a column of hot ash and smoke 10 kilometers (six miles) high on Friday, increasing fears of an eruption.
Hundreds of thousands of Indonesians were ordered to evacuate and three international airports were closed Friday after a volcano on the main island of Java erupted spectacularly, hurling red-hot ash and rocks.
Indonesian officials searched through thick ash for bodies Sunday after Mount Sinabung volcano erupted, killing at least 15 people.
Bulging in land that occurs before a volcano erupts points to how much ash will be spewed into the sky, providing a useful early warning for aviation.
Geologists on Sunday reported insights into super-volcanoes, the brooding, enigmatic giants of Earth's crust whose eruptions are as catastrophic as they are rare.
An Indonesian volcano that has erupted relentlessly for months shot volcanic ash into the air 30 times on Saturday, forcing further evacuations with more than 20,000 people now displaced, an official said.
More than 19,000 people have been displaced by a volcano in Indonesia that has been erupting for months and shot lava into the air nine times overnight, an official said Tuesday.
Some 2,000 people were evacuated in eastern El Salvador Sunday when the Chaparrastique volcano belched and spewed a column of ashes high into the sky.
The Red Cross said Thursday it had recovered some 40 bodies on the streets of Bangui as the United States expressed alarm at the latest eruption of fighting in the Central African Republic.
A volcano off New Zealand sent a plume of steam two kilometres (1.24 miles) into the air Tuesday, although volcanologists described the eruption as small and said it was over in minutes.
One of Indonesia's most active volcanoes has erupted again, spewing clouds of ash, an official said Monday.
A series of powerful eruptions of Guatemala's Volcano of Fire blanketed villages in dense clouds of ash, and prompted evacuation orders for over 33,000 people.
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