AEM survey over Kīlauea summit
Another telephoto view of the Airborne Electromagnetic and Magnetic (AEM) survey, taken as the helicopter traversed over Halema‘uma‘u crater floor, at Kīlauea summit. This photo was taken from Uēkahuna overlook within Hawai‘i Volcanoes National Park, and helicopter and loop are visible in the center left of the image. The flight occurred about 150 feet above the ground, with the hoop suspended another 35 feet below the helicopter. Experienced pilots specially trained and approved for low-level flying operated the aircraft. USGS photo by K. Mulliken.