In 1997 hydrophones 2,000 miles apart heard a sound across the Pacific so powerful it became the Bloop and years of Antarctic recordings eventually linked its acoustic signature to immense icebergs cracking and breaking apart
NOAA’s account of the 1997 Bloop begins with a listening network that captured remote acoustic evidence. Researchers using underwater microphones in the southern Pacific caught an exceptionally strong low-frequency sound on instruments separated by more than 3,219 kilometers. The recording soon gained a memorable name. Years of Antarctic acoustic work later gave NOAA scientists a…
