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Sunday, May 15, 2011

The Sun has gone out!

Solar activity took a big nose-dive on May 14, with the 10.7 cm solar flux
down to 93, and the Smoothed Sunspot Number falling to 38.

They are very low values, so not much hope for reliable HF multi-hop
propagation above 14 MHz over long distances during darkness or
partial-darkness hours.

Notwithstanding that, propagation below 14 MHz has been quite good, at least
into Melbourne, and we have had our first snowfalls in the surrounding

I have been studying the 9 MHz spectrum, which offers lots of activity for
propagation research, with this band now open for the full 24 hours.

Here are some monitoring notes which may be of interest, made on May 14,


9420 GREECE VOG Greek 0700
9480 ENGLAND DW-Woofferton German 0700
9505 USA WYFR English 0700
9595 JAPAN R. Nikkei, Tokyo, early fade-in 0715
9635 VIETNAM VOV East Sea service, Vietnamese 0700
9650 N. KOREA VOK Pyongyang Japanese 0710
9750 JAPAN NHK-Yamata Japanese 0715
9800 FRANCE TWR-Europe English 0720
9860 ENGLAND KBS Skelton massive signal 0715 Korean
9895 VATICAN RN via Santa Maria di Galeria, Dutch 0720


9280 EGYPT R. Cairo French 2100
9305 EGYPT R. Cairo Arabic 2000
9325 N. KOREA VOK carrying KCBS Korean programming 2030
9330 SYRIA R. Damascus English 2115
9375 FRANCE R. Algeria via Issoudin Arabic 2100
9390 KAZAKHSTAN WYFR via Almaty German 1900
9430 ENGLAND VOV-Skelton German 2000
9480 ALBANIA R. Tirana French 1915
9505 GERMANY WYFR Nauen African langs 1915
9535 TURKEY VOT English *2030
9550 VIETNAM VOV French 2100
9620 PORTUGAL KBS-Sines Arabic 2015
9635 TURKEY VOT English *1930
9685 ABU DHABI WYFR Dhabbaya African langs 1930
9700 ROMANIA RRI Spanish 1930
9780 IRAN VOIRI English 1930
9820 PORTUGAL RDP Portuguese 2015
9860 ALBANIA R. Tirana Albanian *2030
9990 EGYPT R. Cairo Hausa 2000

What's the 9 MHz band look like at YOUR listening post?

Regards from Melbourne!

Bob Padula

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