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Science & Technology
Still A Mystery: Are Baffling Clap Sounds Related To Aurora Borealis?
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<blockquote data-quote="Opmmur" data-source="post: 57678" data-attributes="member: 13"><p><span style="font-size: 15px">These strange sounds from aurora borealis have been reported by wilderness wanderers and other individuals but no connection has ever been proven.</span></p><p> </p><p><span style="font-size: 15px">For the first time, researchers at Aalto University in Finland have located where the sounds associated with the northern lights are created.</span></p><p> </p><p><span style="font-size: 15px">They are formed about 70 meters above the ground level in the measured case.</span></p><p><span style="font-size: 15px"><span style="font-family: 'Arial'"><span style="font-family: 'Arial'">Researchers located the sound sources by installing three separate microphones in an observation site where the auroral sounds were recorded.</span></span></span></p><p> </p><p><span style="font-size: 15px">They then compared sounds captured by the microphones and determined the location of the sound source.</span></p><p> </p><p><span style="font-size: 15px">The aurora borealis was seen at the observation site.</span></p><p> </p><p><span style="font-size: 15px">The simultaneous measurements of the geomagnetic disturbances, made by the Finnish Meteorological Institute, showed a typical pattern of the northern lights episodes.</span></p><p> </p><p><span style="font-size: 15px">"Our research proved that, during the occurrence of the northern lights, people can hear natural auroral sounds related to what they see.</span></p><p> </p><p><span style="font-size: 15px">In the past, researchers thought that the aurora borealis was too far away for people to hear the sounds it made."</span></p><p></p><p><img src="http://www.messagetoeagle.com/images/auroraboreal11.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><span style="font-size: 15px"><em>Photo Credits: Aalto University</em></span></p><p> </p><p><span style="font-size: 15px">"This is true. However, our research proves that the source of the sounds that are associated with the aurora borealis we see is likely caused by the same energetic particles from the sun that create the northern lights far away in the sky."</span></p><p> </p><p><span style="font-size: 15px">These particles or the geomagnetic disturbance produced by them seem to create sound much closer to the ground, said Professor Unto K. Laine from Aalto University.</span></p><p></p><p> </p><p><img src="http://www.messagetoeagle.com/images/auroraboreal12.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p><span style="font-size: 15px"><em>This photo was taken on November 23, 2010 in Sodankylä, Lapland, FI.</em></span></p><p> </p><p><span style="font-size: 15px">Details about how the auroral sounds are created are still a mystery. The sounds do not occur regularly when the northern lights are seen.</span></p><p> </p><p><span style="font-size: 15px">The recorded, unamplified sounds can be similar to crackles or muffled bangs which last for only a short period of time. Other people who have heard the auroral sounds have described them as distant noise and sputter.</span></p><p> </p><p><span style="font-size: 15px">Because of these different descriptions, researchers suspect that there are several mechanisms behind the formation of these auroral sounds. These sounds are so soft that one has to listen very carefully to hear them and to distinguish them from the ambient noise.</span></p><p> </p><p><span style="font-size: 15px">The Aalto University researcher's study will be published in the proceedings of the 19th International Congress of Sound and Vibration. The congress is held in Vilnius, Lithuania on 8 to 12 July 2012.</span></p></blockquote><p></p>
[QUOTE="Opmmur, post: 57678, member: 13"] [SIZE=4]These strange sounds from aurora borealis have been reported by wilderness wanderers and other individuals but no connection has ever been proven.[/SIZE] [SIZE=4]For the first time, researchers at Aalto University in Finland have located where the sounds associated with the northern lights are created.[/SIZE] [SIZE=4]They are formed about 70 meters above the ground level in the measured case.[/SIZE] [SIZE=4][FONT=Arial][FONT=Arial]Researchers located the sound sources by installing three separate microphones in an observation site where the auroral sounds were recorded.[/FONT][/FONT][/SIZE] [SIZE=4]They then compared sounds captured by the microphones and determined the location of the sound source.[/SIZE] [SIZE=4]The aurora borealis was seen at the observation site.[/SIZE] [SIZE=4]The simultaneous measurements of the geomagnetic disturbances, made by the Finnish Meteorological Institute, showed a typical pattern of the northern lights episodes.[/SIZE] [SIZE=4]"Our research proved that, during the occurrence of the northern lights, people can hear natural auroral sounds related to what they see.[/SIZE] [SIZE=4]In the past, researchers thought that the aurora borealis was too far away for people to hear the sounds it made."[/SIZE] [SIZE=4][/SIZE] [IMG]http://www.messagetoeagle.com/images/auroraboreal11.jpg[/IMG] [SIZE=4][I]Photo Credits: Aalto University[/I][/SIZE] [SIZE=4]"This is true. However, our research proves that the source of the sounds that are associated with the aurora borealis we see is likely caused by the same energetic particles from the sun that create the northern lights far away in the sky."[/SIZE] [SIZE=4]These particles or the geomagnetic disturbance produced by them seem to create sound much closer to the ground, said Professor Unto K. Laine from Aalto University.[/SIZE] [SIZE=4][/SIZE] [IMG]http://www.messagetoeagle.com/images/auroraboreal12.jpg[/IMG] [SIZE=4][I]This photo was taken on November 23, 2010 in Sodankylä, Lapland, FI.[/I][/SIZE] [SIZE=4]Details about how the auroral sounds are created are still a mystery. The sounds do not occur regularly when the northern lights are seen.[/SIZE] [SIZE=4]The recorded, unamplified sounds can be similar to crackles or muffled bangs which last for only a short period of time. Other people who have heard the auroral sounds have described them as distant noise and sputter.[/SIZE] [SIZE=4]Because of these different descriptions, researchers suspect that there are several mechanisms behind the formation of these auroral sounds. These sounds are so soft that one has to listen very carefully to hear them and to distinguish them from the ambient noise.[/SIZE] [SIZE=4]The Aalto University researcher's study will be published in the proceedings of the 19th International Congress of Sound and Vibration. The congress is held in Vilnius, Lithuania on 8 to 12 July 2012.[/SIZE] [/QUOTE]
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Still A Mystery: Are Baffling Clap Sounds Related To Aurora Borealis?
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