Primary school children wear masks while studying in the classroom in Karo district, North Sumatra province, as Mount Sinabung is seen spewing out volcanic ash through the school window reflection
Mount Bromo spews volcanic material and ash into the air during an eruption in Probolinggo, East Java, Indonesia on Tuesday
Cotopaxi volcano spews ash and steam near Quito, Ecuador, on Thursday
An Indonesian man stands next to a mosque in the village of Tiga Serangkai in Karo, North Sumatra on Wednesday, as mount Sinabung spews volcanic ash in the distance
Volcano Cotopaxi seen from Alaquez, Ecuador. The volcano had a new eruption which spewed ash over the nearby towns
A view of the volcano Cotopaxi from Quito, Ecuador, early on Tuesday. Ecuador’s president imposed a state of emergency in the country over concern that the volcano Cotopaxi might erupt
Richard Bouhet/AFP/Getty Images
Lava flows out of the Piton de la Fournaise volcano as it erupts on the French island of La Reunion in the Indian Ocean.
Mount Raung spews volcanic material into the air as seen from Songgon, East Java, Indonesia on Thursday
Hot lava flows from the crater of Mount Sinabung as seen from Tiga Pancur, North Sumatra, Indonesia, early Thursday
Mount Etna spits lava as it erupts near Catania, Sicily, Italy, on Friday
Smoke billows from the Villarrica volcano in Pucón, Chile. Some southern regions of the country are on alert because of an increase in activity at the volcano
Villarrica volcano, located near Villarrica 1200 km from Santiago, in southern Chile, which began erupting on Tuesday forcing the evacuation of some 3,000 people in nearby villages
Lava erupts from the Piton de la Fournaise volcano on the French Indian Ocean island of Réunion. This is the volcano’s second eruption in the past year after three years of quiet
Piton de la Fournaise, erupting near the Dolomieu, Bory and Rivals craters on the French island of Réunion
A volcanic eruption illuminates the clouds around the Etna volcano, near Catania, Sicily island, southern Italy, early on Monday
Lava and clouds of smoke and gases being emitted from a volcano on the island of Fogo, Cha das Caldeiras, Cape Verde
Inhabitants of Chã das Caldeiras carry their belongings as they flee the volcano erupting in the island of Fogo, Cape Verde
Ulet Ifansasti/Getty Images
A woman walks on a road covered with ash following a further eruption of the Mount Sinabung on Monday in Berastagi, Karo district, North Sumatra, Indonesia
The Mount Sinabung volcano on Sumatra island in Indonesia erupts on Wednesday, following an eruption on Sunday.
An aerial photograph shows the eruption of Mount Ontake in central Japan. More than 30 hikers were found dead on Sunday on the mountainside, a day after the eruption sent plumes of smoke hundreds of metres into the sky.