File:Lightening1.png

English: This shows ten seconds of long wave radio spectrum as recorded in Dublin, Ireland before, during and after a lightning strike. The 10s of time are shown along the x-axis and the frequency is shown on the y-axis. The amount of power detected at that frequency is shown by the brightness of the colour. For example, the horizontal line at 252kHz shows the RTE Radio 1 transmitter on long wave. The bright vertical line shows the lightning strike itself. By looking before and after the lightning at about 60kHz, we can see the radio transmission conditions have changes, where after the lightning strike a dotted line can be seen, which is the "Rugby" time signal from the UK. The spectrum was recorded using a software radio built using Juan Domenech Fernandez's modification to a BT878A TV card and a long wire antenna. The samples were processed with the sox command line tool to produce a spectrogram.

English: This shows ten seconds of long wave radio spectrum as recorded in Dublin, Ireland before, during and after a lightning strike. The 10s of time are shown along the x-axis and the frequency is shown on the y-axis. The amount of power detected at that frequency is shown by the brightness of the colour. For example, the horizontal line at 252kHz shows the RTE Radio 1 transmitter on long wave. The bright vertical line shows the lightning strike itself. By looking before and after the lightning at about 60kHz, we can see the radio transmission conditions have changes, where after the lightning strike a dotted line can be seen, which is the "Rugby" time signal from the UK. The spectrum was recorded using a software radio built using Juan Domenech Fernandez's modification to a BT878A TV card and a long wire antenna. The samples were processed with the sox command line tool to produce a spectrogram.