This is a 24h view of the radio spectrum from 0 to 29 MHz, on March 19/20, 2015, as received in Enschede, The Netherlands. On this day, there was a partial (about 80%) solar eclipse, with the maximum at peaking at 09:37. For more information, see here.
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A live version of this diagram, showing the latest 24 hours, can be found here