The aurora borealis is an optical phenomenon consisting of a glow observed in the night sky in the polar regions, as a result of the influence of particles of the solar wind on the Earth’s upper atmosphere, which are directed by the Earth’s magnetic field. Roughly speaking, it is the result of the Earth defending itself from the “attacks” of the Sun. Although this phenomenon is very common for the colors it produces in the polar skies, the truth is that many of them occur invisibly. The sound they produce has finally been captured.
An investigator managed to record the sound near the Finnish village of Fiskars. The captured result shows noise that is more common than you can imagine and can appear even without lights.
What will the aurora borealis look like?
In the northern latitudes, this event is known as the aurora borealis (Galileo Galilei called it in 1619, in reference to the Roman goddess of dawn, Aurora, and Boris, the Greek god, representative of the north winds). At latitudes in the Southern Hemisphere, the event itself is known as the Australian Aurora, named after James Cook, in direct reference to the fact that it is located in the south.
The aurora usually appears as either a diffuse glow or a horizontal diffuse curtain. Sometimes arcs form that can constantly change and are often not noticeable.
Even with no visible lights during the northern lights that occurred in Finland, scientist Onto Lin recorded the unusual sounds of the phenomenon. The experience was reported on May 11 in a study published on the website SearchGate.
When capturing the sounds, the professor at Aalto University revealed that the noises are more common than previously thought - and they occur even in the absence of a visible sight in the sky.
This negates the argument that the sounds of the aurora borealis are extremely rare and that the aurora borealis must be exceptionally bright and vibrant.
Said Lynn, EN report.
The recordings were made at night near the village of Fiskars, which is part of the Finnish city of Raseborg. Laine picked up hundreds of sounds, then compared them to measurements of geomagnetic activity from the Finnish Meteorological Institute (FMI). The top 60 audio tracks have been linked to changes in the geomagnetic field.
The researcher says that twilight sounds occur even in the absence of their beautiful curtains, and our eyes cannot see anything.
This was the biggest surprise! The sounds are more common than previously thought, but when people hear them without visible aurora borealis, they think it's just an ice breaker or perhaps a dog or some other animal.
Finnish explanation.
In 2016, Unto Laine I published an article It correlates recordings of clicks that occurred during twilight with temperatures measured by the International Monetary Fund. The idea was to prove that this phenomenon can also be caused by an electrical discharge in a temperature-reflecting layer 70 meters above the Earth's surface.
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