National Geographic : 1958 Jun
Bolts of lightning knife through the cloud every few minutes, followed by sharp cracks of thunder. Fifteen- to thirty-minute exposures were needed to capture these pyrotechnic displays-the lavender of lightning and the fiery hue of red-hot rock. 755 Glowing bombs outline the volcano's cinder cone, which spans nearly a quarter of a mile. As each basalt mass rolled down the slope, it left a faint streak on the color film. Thousands combined to create this dramatic scene.