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SIDC Weekly Bulletin

:Issued: 2009 Nov 24 1231 UTC
:Product: documentation at http://www.sidc.be/products/bul
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# SIDC Weekly bulletin on Solar and Geomagnetic activity #
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WEEK 464 from 2009 Nov 16

SOLAR ACTIVITY
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Solar activity was very low during the whole week. Up to three
active regions with sunspots were observed in the northern solar
hemisphere. Two of them received a NOAA numbering, NOAA AR 1032 and
NOAA AR 1033. One was labeled as an Halpha plage, NOAA HaP 1031.
Sunspots were observed in all three regions by the Catania observatory.
No significant flaring activity was noticed.

GEOMAGNETIC ACTIVITY
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Geomagnetic activity was very low during the whole week.

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DAILY INDICES
DATE RC EISN 10CM Ak BKG M X
2009 Nov 16 013 008 76 001 A0.0 0 0
2009 Nov 17 000 000 77 000 A0.0 0 0
2009 Nov 18 024 008 76 002 A0.0 0 0
2009 Nov 19 044 017 77 003 A0.0 0 0
2009 Nov 20 026 017 76 002 A0.0 0 0
2009 Nov 21 018 011 76 010 A0.0 0 0
2009 Nov 22 /// 008 76 006 A0.0 0 0
# RC : Sunspot index (Wolf Number) from Catania Observatory (Italy)
# EISN : Estimated International Sunspot Number
# 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)
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NOTICEABLE EVENTS
DAY BEGIN MAX END LOC XRAY OP TENCM TYPE Cat NOAA NOTE

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# 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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