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OK0NAG > SOLAR    23.02.18 15:20l 131 Lines 4283 Bytes #999 (0) @ EU
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Subj: GEOALERT SIDC
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Subject: GEOALERT SIDC
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To: solar@eu
Date: Fri, 23 Feb 2018 12:30:14 GMT
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:Issued: 2018 Feb 23 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#

# GEOALERT message from the SIDC (RWC-Belgium)                       #

#--------------------------------------------------------------------#

GEOALERT BRU054
UGEOA 30512 80223 1230/ 9930/ 
10232 22232 30232 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 23 Feb 2018 until 25 Feb 
2018
PREDICTIONS FOR 23 Feb 2018  10CM FLUX: 068 / AP: 021
PREDICTIONS FOR 24 Feb 2018  10CM FLUX: 068 / AP: 012
PREDICTIONS FOR 25 Feb 2018  10CM FLUX: 068 / AP: 012
COMMENT: There are no sunspot regions on the visible hemisphere of the 
Sun
and flaring level is very low. The chance for a C flare in the next 24

hours is estimated at 5%.

No Earth-directed Coronal Mass Ejections (CMEs) were observed in available

coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24

hours, and is expected to stay at nominal levels in the next 24 hours.


The solar wind speed (recorded by DSCOVR and ACE) gradually increased from

about 405 to 550 km/s in the past 24 hours. The Interplanetary Magnetic

Field (IMF) was directed mainly toward the Sun and its magnitude ranged

between about 2 and 11 nT. Bz was variable and dived below -5 nT several

times, with a minimum of about -8 nT. On February 23, 24 and 25 the solar

wind is expected to be at nominal levels, possibly with occasional periods

of enhanced solar wind as the Earth comes close to the high speed stream

associated with the negative polarity south polar coronal hole.

Quiet to active geomagnetic conditions (K Dourbes between 1 and 4; NOAA 
Kp
between 2 and 5) were registered in the past 24 hours. Quiet to active

geomagnetic levels (K Dourbes < 5) are expected for February 23, 24 and 
25,
with a chance for minor storm intervals (K Dourbes = 5) when the Earth

comes close to the high speed stream associated with the negative polarity

south polar coronal hole.

TODAY'S ESTIMATED ISN  : 000, BASED ON 16 STATIONS.
99999
UGEOI 30512 80223 1230/ 22/// 
1//// 20680 3016/ 4//// 8//// 9//// 
99999

NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX  END  LOC    XRAY OP  10CM Catania/NOAA RADIO_BURST_TYPES 

NONE
END

UGEOR 30512 80223 1230/ ///// ///// 
99999
UMAGF 30503 80223 1004/ 22066 1/025 21223 34423
UMAGF 31523 80223 0000/ 22007 1/016 22112 33354

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