This map of 28-April-2005 covers from 13:45z to 15:26z. This opening was a real surprise. I can't recall any opening of sporadic-E on 144 MHz before May, and this was not only before than normal but it was also a major opening, allowing hundreds of QSO for about one hour. The ionized cloud was over north-western Italy and kept stable all the time, with MUF reaching almost 200 MHz. It definitively looked like an opening in the highest part of the sporadic-E season!

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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. 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 |

Logs received:

Stations worked by PA3CEG from JO33FB;
First 144 ES in 2005 on 28 april in JO33, just a few minutes after 14.00 Z [notified by Andre PC1T (ex pa5wx)].

14.20  IS0DQX         JM49OH
14.24  IS0XUM         jm49?           Hrd
14.30  IW0ULG        JM49NH
14.31  IW0UEI          JN40GR
14.37  IS0XDA         JM49OH
73? Eene

QSO on 2005-04-21, at 1430 UTC. 70.450 Mhz, G4MUF (IO91BM)-S51DI

(JN76VL). AZ=110 degrees, Distance 1271 Km I hope this helps your spodic e studies
73 Richard, G4MUF

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)

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