Landsat collected images of an ash plume and pyroclastic flow from Sinabung on March 6, 2014. The top, natural-color image shows the volcano, ash plume, and volcanic debris surrounded by farms and forest. The lower image, in false-color (shortwave infrared, near infrared, green), reveals a hot lava flow (red spots) creeping down the eastern flank of Sinabung. Additional hot spots may indicate an extension of the lava flow, or hot debris spilling from its advancing face. The false color image also differentiates between clouds (tinted orange) and a gas and steam plume (tinted blue) above Sinabung’s summit. Both are pure white in natural-color.
Thanks to Fabrice Digonnet, Culture Volcan blog, & Rudiger Escobar-Wolf, Michigan Tech University, for help interpreting the image.
NASA Earth Observatory image by Jesse Allen and Robert Simmon, using Landsat data from the USGS Earth Explorer. Caption by Robert Simmon.