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Natural Radio Lab

Natural Radio is the VLF radio emissions that originate terrestrially from lightning and within the earth's magnetosphere through interaction with the Sun. Most of these radio signals, sferics, tweeks, whistlers, chorus and others, occur within the range of human hearing, and can be heard with simple receivers as described on this site.

Natural Radio Lab also looks at Space Weather and Geomagnetic Storms. These are affected by solar activity such as the solar wind, sunspots, solar flares and coronal mass ejections or CMEs. In the popular media, these events are often loosely referred to as "solar storms" or "sun storms".

Please explore this site. I hope you go beyond reading what's here and actually go out and take the opportunity to hear whistlers or the enchanting sounds of the dawn chorus.

Mark Karney, N9JWF
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What are “VLF Emissions”?

naturalradiolab.com Posted on January 28, 2012 by Mark KarneyOctober 21, 2012

VLF Emissions are Natural Radio signals that are thought to originate in the magnetosphere on the sunward side of the earth near the geomagnetic equator and then propagate toward the poles along the field lines where they exit the ionosphere and propagate along the surface of the earth where they may be heard. While the mechanism is understood in the general sense, much still remains to be learned. VLF emissions include chorus, risers, hiss, and a variety of other signals. They are often heard during times of high geomagnetic activity.

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