|One of Alaska's Most Active Volcanoes|
Mount Cleveland is one of the most active volcanoes in Alaska and a serious threat to air traffic. This eruption occurred on May 23, 2006 and was captured in this image by Jeff Williams, an astronaut on the International Space Station. Enlarge. More information.
|Thermal Image of A'a Flow at Kilauea|
This is a thermal image of a channelized a'a flow that was being fed by the fountains at the west end of Kilauea's fissure system. Near the end of the flow, the channel empties into a delta-like flow front. USGS image. Enlarge.
|Kasatochi Blanketed with Pyroclastics|
The southwest flank of Kasatochi volcano was blanketed with fine-grained pyroclastic debris after a pyroclastic surge and ash fall on August 22, 2008. Image by Chris Waythomas, USGS. Enlarge. More information.