A Mysterious Sound Echoed Across the Pacific — Its Source Took 8 Years to Find

  • تاريخ النشر: منذ 3 ساعات زمن القراءة: دقيقة قراءة

The strange 1997 ocean sound was ultimately traced to a powerful Antarctic iceberg icequake.

The Sound Was Detected in 1997

It Was Far Below Normal Human Hearing

Its Range Made It Exceptional

Its Acoustic Shape Looked Biological

The Ocean’s Size Encouraged Wild Theories

NOAA Suspected Ice Instead

Scientists Moved Their Listening Network South

The Source Was Confirmed in 2005

Its Exact Origin Remains Approximate

The Real Culprit Was Powerful Enough

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In 1997, underwater microphones operated by the US National Oceanic and Atmospheric Administration detected an extraordinarily powerful low-frequency sound in the southern Pacific. The signal was heard by hydrophones positioned thousands of kilometres apart and seemed to rise rapidly in frequency, earning it the memorable nickname “the Bloop.”

Its unusual acoustic shape initially left room for theories involving secret machinery, whales, giant squid, or an unknown creature larger than anything known to science. NOAA researchers suspected a geological explanation, but it took eight years of Antarctic recordings before they could confidently identify what had produced it.

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