The Project GNOME water tank and ground shock spring instrument wall are seen to the upper right:
5 chemical bombs were detonated 4000 feet (1219 m) below the water near the San Catalina Islands, off the coast of San Diego, California.
Ground zero at the GNOME site near Carlsbad, New Mexico:
A camera was mounted in shock-resistant device when the ground violently heaved up from below, as the ball measured the displacement:
Radiation counters require calibration:
Typical shots involved dozens if not hundreds of individual experiments:
Control Point countown ....
Oak Spring Butte loomed in the distance, behind Sedan, viewed from southwest to northeast on Yucca Flat:
Sedan ended in a crater is 100 m (330 ft) deep and a diameter of about 390 m (1,280 ft):