In this June 16, 2010 satellite image provided by NASA, Papua New Guinea's Manam Volcano releases a thin, faint plume, as clouds cluster at the volcano's summit. The Advanced Land Imager (ALI) on NASA's Earth Observing-1 (EO-1) satellite took this image. The clouds may result from water vapor from the volcano, but may also have formed independent of volcanic activity. The volcanic plume appears as a thin, blue-gray veil extending toward the northwest over the Bismarck Sea.