The long distance between

Forums General Discussion Photoacoustic effect The long distance between

John Cook

The long distance between meteor trails / aurora and ground level means that there would be a long delay between the visual and acoustic, and so difficult to correlate. I have read that the strong electric fields associated with aurora can lead to static discharges on things like pine needles, leading to a crackiling noise. My only two experiences of the aurora were not accompanied by static noise, although I do remember hearing howling dogs at 2AM in Alaska while watching a good display nearly 30 years ago!