This map of 29-May-2005 covers from 13:45z to 17:00z. (there is another map covering 17:00z to 20:02z) What a huge and spread opening (openings in fact). At 13:50 the first QSO were made from southern EA to G using a "cloud" that formed above the western Pyrenees. That cloud became huge, covering all North-East of Spain and Western France for MORE THAN SIX HOURS, allowing thousands of QSO, including several double skip QSO over 2900 Km between EA8 and PA/DL. Apart from this major cloud, later at about 15:00 two new clouds show up above the coast of Algeria and above Greece. At 15:35 another one above Romania, at 15:45 another one above Turkey and finally at 17:10 yet another one above Balearic Islands.
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This map 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 QSO and reports of European stations and basically from DX-spots collected by DXMAPS. 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 that lack of data.
| Other Sporadic-E maps | MUF forecast |
You can help develop these maps!. After the openings, please send me your logs of 50, 70 and 144 MHz QSO via sporadic-E (Much preferably in ADIF format)