Reported on the 11th, in the polar regions to be able to see the beautiful aurora, but these can always hear some unknown sources of sound, the introduction of speculation. Scientists find the source of these sounds, issued by the formation of charged particles in the aurora.
Theoretically, the height of the aurora occur more than about 90 km above the ground, the atmospheric density is very thin, it is difficult to form a human ear can hear sound. Finland's Aalto University to identify the causes of this sound, the sound location is the altitude of 70 m from the surface. The researchers used three microphones to confirm the locations of the sound, and measure the magnetic field disturbances.
Aalto University, Lynn said, "In the past, scientists believe that the aurora is too high, humans can not hear the sound made by Aurora. Aurora appears, is a distorted because the sun to the release of charged particles toward the Earth, encountered above the Arctic magnetic field magnetic field, the formation of the charged particle energy release our findings, the formation of the auroral form of charged particles created the sounds. "
Theoretically, the height of the aurora occur more than about 90 km above the ground, the atmospheric density is very thin, it is difficult to form a human ear can hear sound. Finland's Aalto University to identify the causes of this sound, the sound location is the altitude of 70 m from the surface. The researchers used three microphones to confirm the locations of the sound, and measure the magnetic field disturbances.
Aalto University, Lynn said, "In the past, scientists believe that the aurora is too high, humans can not hear the sound made by Aurora. Aurora appears, is a distorted because the sun to the release of charged particles toward the Earth, encountered above the Arctic magnetic field magnetic field, the formation of the charged particle energy release our findings, the formation of the auroral form of charged particles created the sounds. "
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