NASA satellites detected ash from Mount Kelut nearly 20 kilometers (12 miles) in the atmosphere within two hours of the explosive February 13 eruption.
A new eruption of the Chaitén Volcano forced authorities to evacuate residents who had returned to the nearby town of the same name. Ash emissions from the eruption spread across Patagonia to the Argentine east coast.
A thick plume of ash rose from Mount Merapi on November 10, 2010, when this photo-like image was taken. It is the most cloud-free image of the eruption to date.
Acquired May 13, 2010, this natural-color image of Eyjafjallajökull Volcano shows a puffball of volcanic ash towering over a lower-altitude ash plume that fans out toward the southeast.