The location of exploding granules

The occurrence of narrow blue spikes in high resolution spectra of Fe l lambda 5269 taken at the Sacramento Peak Observatory by Hyder (1970) led him to suggest that these features might be associated with the upward velocities in exploding granules and lead to the formation of spicules. As is known from Beckers and Morrison (1970) granules exhibit a toroidal flow pattern which is upward in the center. This kind of flow was used by Musman (1972) to explain exploding granules. An earlier examination of granulation photographs gave some evidence that exploding granules did not occur at random locations. The location of exploding granules is compared with the location of the chromospheric network. To accomplish this the locations of exploding granules were compared with the location of the overlying chromospheric network where concentrations of magnetic field and spicules appear. K2 violet filtergrams were used as a convenient locator of the chromospheric network. (WDM)