[A-DX] Die Sonne erwacht; Sonnenfleckenrelativzahl bei 52!

["Stephan Schaa" <schaa@xxxxxxxxxxx>]

Hallo allerseits!

Das Sonnenfleckenminimum schein durchschritten zu sein. Nachdem gestern
schon eine SSN von über 30 gemittelt wurde, geht?s heute schon auf über 50. 

"Schuld" daran sind drei gesichtete Sonnenflecken. Solarflux liegt aktuell
bei 89 und K-Index bei 5.Damit dürften vor allem die höheren Frequenzen
wieder bessern Empfang bieten, allerdings ist auch die Gefahr von
Radioblackouts bei Solar-Flares höher.



Hier das Originalzitat von NW7US auf HCDX:


-----------------------------

Bulletin from Tomas Hood, NW7US:

"The Sun awakens in the early dawn of Sunspot Cycle 24"

During the week of March 24, the Sun became quite active.  This, after many
months of long stretches of quiet, sunspot-less days.  March 25 images of
the sun revealed a train of sunspots, NOAA AR 0987 (a beta configuration),
0988 (a beta configuration), and 0989 (an alpha configuration).  For many
months prior, there would be an occasional sunspot, if any at all.  These
three sunspots indicate a sun that is waking up; there was even a strong
M1-class solar flare on March 25, the first such strong flare in a long
period of quiet (the last such flare was mid-2007).

The M1.7 magnitude flare originated in sunspot 0989, which was on the very
edge of the sun, not facing us.  As this sunspot group rotates into what is
known as "geo-effective" position, it may well cause intense radio blackouts
and storms, while also strengthening the ionosphere, in turn creating great
DX opportunities on higher HF frequencies during non-radio blackout periods.
Radio blackouts occur during solar flares.

On the same day, March 25, the solar flux (10.7-cm flux index) rose from the
low 70's to the high of 89 (as of the time this is being written), and the
flare caused minor storming and a radio blackout on HF.  This is a great
trend for those interested in using the high frequencies for radio
communications.  As we now move away from sunspot cycle minimum to the peak
of cycle 24, sometime in the next three to five years, activity will
increase.  With this increase in activity will come better HF propagation on
the higher portions of HF, while also bringing an increase in radio
blackouts and geomagnetic storminess that is part of an active cycle.

We're in for the exciting start of a new solar cycle!  Some forecasters
speculate that this solar cycle will not be too active.  I still hold to one
early forecast that speculates that the cycle may be a very active and
exciting one.  Time will tell!

DX note: the forecast for March 26, 27, 28: Solar Flux expected to reach 90
to 95.  This will increase higher frequency propagation on most DX paths.
This is a time to be on the radio.

---------------------------

Stephan


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