Great Midwestern aurora of November 2004 was so intense it knocked out AM radio DX via D-layer absorption–at night!
High solar activity benefits radio scientists and radio amateurs alike.
The streaming internet audio provided by forward-thinking AM stations allows quality license-free rebroadcasts.
Simple equipment to monitor geospace conditions.
What they don’t tell you about crystal radios is you need to be under the radio station transmitter for it to work!