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This map from 10-May-2004 covers from 16:40z to 17:14z. 50 MHz were wide open all over Europe almost whole day, sometimes with MUF over 100 MHz, and finally a cloud over southern Italy reached enough ionization to allow some QSO from Bulgaria to Northern Spain and Southern France.

This animation can take some time (minutes) to load because of its size. Be patient and wait !
If you can see the map only partially press the "Refresh" button of your browser.

Use the "Stop" button of your browser to stop the animation and the "Refresh" button to run it again from te begining.

It shows the evolution, size and MUF of the sporadic-E cloud that caused the opening on 144 MHz. and it is an estimation based on the information I have picked up here and there of QSOs and reports of European stations. I don't claim it to be accurate but just an estimation that could help understand what happened that day.

Also please notice that sometimes you will see MUF rise very quickly.  This is because of the almost complete lack of data for frequencies between 51 and 144 MHz. that leads to shown MUF rising almost 90 MHz in one minute.  You should understand that this is not the usual behaviour of MUF, but the result of the lack of data mentioned above.

| Other Sporadic-E maps | MUF forecast |
 
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