The December 1974 lava flow erupted from a series of en echelon fissures close to the summit of Kilauea Caldera. Here is an example of a fissure approximately 2 meters wide that is invisible on the SIR-B radar image (slide #26). Fissures of comparable dimensions may also have been the vents for the flows on the flanks of Sif Mons, Venus (slide #33). Photograph courtesy of L. Gaddis. Right click here to download a high-resolution version of the image (2.91 MB) |