Decode the mysterious sound of the Northern Aurora

This mysterious sound appeared both in legend and made anyone who happened to hear both anxious and frightened.

However, for the first time in history, strange cracks and blasts in the Northern Aurora region have been explained in detail by science.

DailyMail reported that Finnish Aalto University researchers have located the source of the above mysterious sounds. It turned out they were formed about 70m above the ground.

To locate the source of the sound, the team installed three ultra-sensitive independent microphone devices at an observation station. Previously, the task of this station was to record the sounds emitted during the aurora.

For the first time, science can explain the origin of the mysterious sound of the Northern Aurora.

They then compared the sound obtained by the microphone to determine where the sound came from.

The cause of aurora is because the Earth's magnetic field is disturbed and the phenomenon is spectacular, this period often occurs about 120km from the Earth's surface. When the observatory noted the aurora light, the Finnish Astronomical Institution immediately measured geomagnetic interference. The data obtained show a typical pattern of Northern aurora.

'Our research proves that, during the Northern aurora, humans can hear natural aurora sounds' , Professor Unto K.Laine said.

In the past, science had always thought that aurora occurred too far, so ordinary people could not hear the sound due to particles colliding with the Earth's magnetic field. This is not wrong. However, the source of the sounds associated with the aurora may be the energy particles emanating from the sun, Professor Laine explained. These particles, or electromagnetic disturbances caused by them, seem to produce sounds closer to the ground than the light of the aurora.

However, the specific mechanism of how aurora sounds are created remains a mystery. These sounds are not always heard, even when aurora light appears in the sky. Sounds that sound like cracks or blasts that the microphone receives are only ringing in the blink of an eye.

Some witnesses have heard the aurora sound describing them as a 'vague, distant noise and obesity' . Also due to these very different descriptions, researchers believe that there may be many mechanisms behind the formation of aurora sound.