:Issued: 2007 Feb 27 1252 UTC
:Product: documentation at http://www.sidc.be/products/meu
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# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
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SIDC URSIGRAM 70227
SIDC SOLAR BULLETIN 27 Feb 2007, 1231UT
SIDC FORECAST (valid from 1230UT, 27 Feb 2007 until 01 Mar 2007)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Active conditions expected (A>=20 or K=4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 27 Feb 2007  10CM FLUX: 076 / AP: 012
PREDICTIONS FOR 28 Feb 2007  10CM FLUX: 076 / AP: 012
PREDICTIONS FOR 01 Mar 2007  10CM FLUX: 077 / AP: 007
COMMENT: The expected rise of the solar wind speed did not happen as it
had done consistently during several recurrences of the current
high-speed solar wind stream. The solar wind sped is now rising again
slightly to 480 km/s, which remains much below the 650km/s of previous
solar rotations. We thus confirm our early conclusion: the recurrent
coronal hole has largely decayed and the associated wind stream will
probably be much less geoeffective. We thus predict only unsettled
geomagnetic conditions with only a small chance for active periods over
the coming two days. The Earth magnetosphere will then return to quiet
levels.
No change expected regarding the very low flaring activity on the Sun.

TODAY'S ESTIMATED ISN  : 016, BASED ON 04 STATIONS.

SOLAR INDICES FOR 26 Feb 2007
WOLF NUMBER CATANIA    : 022
10CM SOLAR FLUX        : 075
AK CHAMBON LA FORET    : 012
AK WINGST              : ///
ESTIMATED AP           : 006
ESTIMATED ISN          : 014, BASED ON 08 STATIONS.

NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX  END  LOC    XRAY OP  10CM RADIO BURST TYPES     Catania NOAA NOTE
NONE
END
BT
 
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