Solar Radio Observations for 21 April 2013
Where needed, additional descriptive information is provided below the chart and spectrogram images. Audio is available for some of the later charts on this page.
The chart above shows the full vertical amplitude of the solar radio burst, and the chart below has been zoomed to show the beginning and end of the burst in more detail.
Click on the spectrogram or chart above for a monaural recording (31.972 MHz) of this burst
Click on chart or spectrogram above to listen to a stereo recording of this burst