NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Mount Pinatubo. False-colour radar image of Mount Pinatubo on Luzon in the Philippines. The image is a composite of radar views made at 24cm and 6cm wavelengths, and covers an area of 45km by 68km. The colours are derived from radar reflectivity in different polarisations. This method highlights the rough ash from the 1991 eruption of Pinatubo as red. The wide, dark channels leading from the volcano are large, smooth mud deposits. The dark blue areas at upper right are fields in the central plain of the island of Luzon. The data for this image were gathered by the orbiting Shuttle Imaging Radar-C (SIR-C) during the STS-59 mission of 9-20 April 1994.
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