How Volcanoes Work

 Image Described in Caption
 Kileaua Volcano -- The summit area of the Kileaua shield volcano is delineated by the near cirucular Kilauea caldera. The crater visible on the west side of the caldera is Halemaumau, the site of many spectacular eruptions over the past 200 years. The blue to purple lava flows evident in the image are recent eruptions from the summit area and along both the southwest and east rift zones of Kilauea. The east rift zone is marked by numerous craters trending to the southeast of Kilauea crater and then bending to the east. The recent lavas along the east rift system are from the Pu'u O'o eruptive series, which began in 1983 and is still continuing. These flows have advanced down the escarpment of Hilna Pali. This image is a color composite Spaceborne Radar image taken from the Space Shuttle, Endeavor on April 15, 1994. Courtesy of JPL/NASA.