This page shows a "waterfall" representation of the 0 - 29 MHz spectrum during the past 24 hours, as received by the WebSDR receiver in Enschede, The Netherlands. The brightness of each pixel the signal power in a 2 kHz wide bit of spectrum, averaged over 1 minute.

The main goal of this was originally to observe the effect of the solar eclipse on March 20, 2015, but also in the absence of a solar eclipse, many interesting things are visible. See here for an analysis of the eclipse.

Please allow some time for the page to load; it's about 15 MB of data, and this data is sent at low priority by our server (in order not to disturb real-time listening).