This map from 21-July-2003 covers from 15:29z to 18:32z. An incredible cloud over southern Poland that kept MUF over 144 MHz for three hours and allowed many, many QSOs with eastern Europe and also from Scandinavia to the south. Look at this incredible map made with the data of more than 2300 QSOs I have collected !.
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.
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. and 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.
Use the "Stop" button of your browser to stop the animation and the "Refresh" button to run it again from te begining.
| Other Sporadic-E maps | MUF forecast |