Science & Technology

Does the aurora make a sound?Scientists find important answers

The aurora is a remarkable phenomenon, a dazzling show of green and crimson light near the Earth’s poles, where the magnetic fields are strongest. We primarily consider them to be just visual, but they also seem to have an auditory component. This has fascinated researchers for centuries, but now we can get closer to a better understanding of what is really happening.

Image Credit: Flickr / Mark Wilson

Fiona Amelie, a researcher at the University of Cambridge, hopes to better understand this strange phenomenon and see if the reported sounds are real or fantastic / imaginative. I decided to look up historical reports. And she seems to have found some very interesting answers.

“This is a question that has puzzled observers for centuries. Does the aurora’s fantastic display of green and crimson light produce identifiable sounds?” Amelie, who travels and looks for aurora, writes. In a blog post In conversation. “But reports of aurora making noises are rare and have historically been rejected by scientists.”

Aurora sound

People describe the sound of the aurora as a quiet, almost imperceptible crackle, growl, or growl.Amery has found personal testimony since the early 1930s Published in the Shetland Islands newspaper, People compare the sound to “buzzing silk” or “two boards meeting a flat road”.

Most often seen at night, Aurora Produced thanks to the sun. They are the result of charged particles reaching our planet. Particles are carried to the poles by the Earth’s magnetic field and interact with particles in the atmosphere. This is happening all the time, but sometimes the sun sends more energetic particles, producing an impressive aurora.

Scientists went on an expedition between 1882 and the first International Polar Year (IPY) of 1883 to learn more about the sounds of the aurora. Little was known about the aurora, and less was known about its sound.Research continued Second IPY From 1922 to 1933, many researchers believed that the aurora was too far away to hear the noise.

British physicist Oliver Lodge, Insisted According to Amery, the sound of the aurora is likely to be a psychological phenomenon caused by the appearance of the aurora, much like a meteorite evokes a fantastic sound in the brain. Meteorologist George Clark Simpson, I have written The low aurora was an “optical illusion” caused by the interference of low clouds.

However, not everyone is convinced of these theories, and some argue that the aurora is making noise.For example, a Canadian astronomer Clarence chart He argued that the movement of the aurora would change the Earth’s magnetic field, changing the electrification of the atmosphere. This causes a crackling sound near the surface of the earth.

year 2012, To rainA Finnish acoustician has released a recording of the Aurora House from his hometown. Then, in 2016, he explained that the sound was caused by the inversion of cold air in the atmosphere that could form under the aurora. In fact, weather reports showed that such a reversal had occurred when he made the recording.

Recently, the sound of the aurora has been sought for its aesthetic value.The composer Erics Esembals created the composition using an excerpt from a journal from an explorer who claims to have heard the aurora. “Aurora.” And the BBC played In 2020 Aurora ultra-low frequency radio recording into the audible spectrum.

“There is no doubt that so-called aurora sounds have been recorded many times and they are created by the discharge process in the temperature inversion layer,” Rain said. Told NBC News.. “Solar wind fluctuations are behind both visual and auditory phenomena.”

The paper was published in journal Royal Society..

Does the aurora make a sound?Scientists find important answers Does the aurora make a sound?Scientists find important answers

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