Whale Songs Can Travel Over 10,000 Miles Through the Ocean — Longer Than the Atlantic

Whales are the loudest animals on Earth. The blue whale's call can reach 188 decibels — louder than a jet engine at takeoff. But the truly extraordinary fact is not the volume; it's the range.

Low-frequency whale calls travel through a layer of the ocean called the SOFAR channel — short for "Sound Fixing and Ranging." At about 1 km depth, water conditions trap sound waves so efficiently that they can travel for thousands of kilometers with minimal loss of energy. Calls have been documented traveling over 16,000 km — longer than the diameter of the Atlantic Ocean.

What This Means

• A blue whale off Alaska may, in theory, hear a blue whale off New Zealand
• Whale "songs" of humpbacks change yearly and spread across populations like cultural fashions
• Some whales return to the same stretch of ocean each year and re-learn last year's songs
• Modern shipping noise has reduced the effective communication range of whales by an estimated 90%

The Loneliest Whale

The "52-Hertz Whale," first detected in 1989, sings at an unusual frequency that no other whales appear to respond to. It has been tracked for decades, swimming alone across the Pacific. It may be one of the only known cases of an animal singing into a void no one else can hear.