> :Issued: 2005 Apr 04 1428 UTC
> :Product: documentation at http://sidc.oma.be/products/bul
> #--------------------------------------------------------------------#
> # SIDC Weekly bulletin on Solar and Geomagnetic activity #
> #--------------------------------------------------------------------#
> WEEK 222 from 2005 Mar 28
>
> SOLAR ACTIVITY
> --------------
> Solar activity was extremely quiet this week, the GOES X-ray flux was
> constantly below B-level
> (apart from a single B1 flare). A large low latitude northern coronal
> hole and the lack of big
> active regions
> were responsible for very low 10cm flux measurements (below 80). By the
> end of the week, the rise
> in the 10cm flux and X-ray flux indicated the returning of old active
> region NOAA 0743 (now 0749).
> This active region didn\\\'t produce any flares during last rotation. For
> next week, we expect
> further quiet solar conditions.
>
> GEOMAGNETIC ACTIVITY
> --------------------
> Geomagnetic activity was mostly very quiet this week, with isolated
> intervals of active conditions of
> which the source is unclear. By April 1st a low latitude coronal hole in
> the northern hemisphere
> was situated at the center of the disk. Compared to previous rotations
> the coronal hole seems to
> have diminished in area. The associated high speed wind stream only
> arrived late April 3rd at earth.
> ---------------------------------------------------------------------------
> DAILY INDICES
> DATE RC 10CM Ak BKG M X
> 2005 Mar 28 028 80 /// A2.8 0 0
> 2005 Mar 29 015 79 /// A2.7 0 0
> 2005 Mar 30 011 78 /// A2.0 0 0
> 2005 Mar 31 011 77 /// A1.7 0 0
> 2005 Apr 01 011 78 /// A2.5 0 0
> 2005 Apr 02 /// 80 /// A3.4 0 0
> 2005 Apr 03 /// 81 /// A3.2 0 0
> # RC : Sunspot index from Catania Observatory (Italy)
> # 10cm: 10.7 cm radioflux (DRAO, Canada)
> # Ak : Ak Index Wingst (Germany)
> # BKG : Background GOES X-ray level (NOAA, USA)
> # M,X : Number of X-ray flares in M and X class, see below (NOAA, USA)
> ---------------------------------------------------------------------------
> NOTICEABLE EVENTS
> DAY BEGIN MAX END LOC XRAY OP TENCM TYPE Cat
> NOAA NOTE
>
>
> #--------------------------------------------------------------------#
> # Solar Influences Data analysis Center - RWC Belgium #
> # Royal Observatory of Belgium #
> # Fax : 32 (0) 2 373 0 224 #
> # Tel.: 32 (0) 2 373 0 491 #
> # #
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> #--------------------------------------------------------------------#
73 & GUD DX,
Thomas F. Giella, KN4LF
Retired Space & Atmospheric Weather Forecaster
Plant City, FL, USA
Grid Square EL87WX
Lat & Long 27 58 33.6397 N 82 09 52.4052 W
kn4lf@arrl.net
Contesting Propagation eReflector:
http://lists.contesting.com/mailman/listinfo/propagation
HC-DX Propagation Channel:
http://www.hard-core-dx.com/index.php?topic=Propagation
KN4LF Daily Solar Space Weather & Geomagnetic Data Archive:
http://www.kn4lf.com/kn4lf5.htm
KN4LF Daily LF/MF/HF Radio Propagation Outlook:
http://www.kn4lf.com/kn4lf6.htm
KN4LF HF/MF Radio Propagation Theory Notes: http://www.kn4lf.com/kn4lf8.htm
KN4LF Amateur & SWL Radio History: http://www.kn4lf.com/index.htm
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