This map of 27-May-2004 covers from 14:50z to 16:17z. The ES cloud was over Switzerland and it allowed some dozens of QSO on 2m.between U.K. and 9A, S5, YU, LZ in about 45 minutes.  MUF was up and down all that time, hardly reaching 160 MHz.

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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:


2SSB 27-May-04 15:25 2003 G4LOH 59 59 io70jc
2SSB 27-May-04 15:36 2004 G7RAU 59 59 io90ir
2SSB 27-May-04 15:40 2005 GW8JLY 59 59 io81jm
2SSB 27-May-04 15:45 2006 GW8ASA 59 59 io81em
2SSB 27-May-04 15:56 2007 G3NVO 59 59 io91jk
2SSB 27-May-04 15:57 2008 G3NAQ 59 59 io91hl
2SSB 27-May-04 15:57 2009 G2BOF 59 59 io91vi
2SSB 27-May-04 15:58 2010 GW4DGU 59 59 io71sv


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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