GEOALERT SIDC

3-day-forecast of solar and geomagnetic activity.
Source SIDC (RWC-Belgium)
Frequency Daily
Format Encoded data (ISES)
Mail header GEOALERT SIDC
SIDC code xut

Latest issue 

:Issued: 2025 Jan 14 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU014
UGEOA 30512 50114 1230/ 9930/ 
11142 22142 30142 
99999
PLAIN
PREDICTIONS FOR 14 Jan 2025  10CM FLUX: 160 / AP: 019
PREDICTIONS FOR 15 Jan 2025  10CM FLUX: 162 / AP: 007
PREDICTIONS FOR 16 Jan 2025  10CM FLUX: 164 / AP: 021

Solar Active Regions and flaring: Solar flaring activity was low over the
past 24 hours with several C-class flares. The largest flare was a
C3.4-flare, with peak time 01:46 UTC on Jan 14 2025, from SIDC Sunspot
Group 360 NOAA AR 3947 (beta-gamma). There are currently 7 numbered active
regions on the visible disk. SIDC Sunspot group 2360 (NOAA AR 3947) is the
most complex AR (beta-gamma). The solar flaring activity is expected to be
at low levels over the coming day with C-class flares expected and a chance
of M-class flares.

Coronal mass ejections: No new Earth-directed Coronal Mass Ejections (CMEs)
have been detected in the available coronagraph images.

Coronal holes: The large east-west elongated negative polarity equatorial
coronal hole (SIDC Coronal Hole 87) is still crossing the central meridian.
A high-speed stream from this coronal hole may enhance the solar wind
environment near Earth on Jan 16.

Solar wind: Over the past 24 hours, the solar wind speed has increased
temporarily to 495 km/s, then returned back to around 411 km/s.The
interplanetary magnetic field varied between 6 nT and 8 nT, with the Bz
reaching a minimum value of -6 nT.


Geomagnetism: Geomagnetic conditions were globally and locally quiet to
unsettled (Kp 3 and K Bel 3). Quiet to active conditions with
possible isolated minor geomagnetic storm levels are expected for the next
24 hours.


Proton flux levels: The greater than 10 MeV proton flux remained below the
10 pfu threshold and is expected to remain so over the next days.


Electron fluxes at GEO: The greater than 2 MeV electron flux remained below
the 1000 pfu alert threshold, and is expected to remain below the threshold
during the next 24 hours. The 24h electron fluence was at normal levels and
is expected to remain so.


TODAY'S ESTIMATED ISN  : 081, BASED ON 11 STATIONS.
99999
UGEOI 30512 50114 1230/ 13/// 
1//// 21600 3012/ 4//// 8//// 9//// 
99999

NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX  END  LOC    XRAY OP  10CM Catania/NOAA RADIO_BURST_TYPES 
NONE
END

UGEOR 30512 50114 1230/ ///// ///// 
99999
USSPS 81202 13001 09442 14002 43723 01202 09001 47021 01203 05027 46413
51405 06001 36511 01202 18001 34617 0/101 17036 17417 41303 12013 40307
21408
UMAGF 30503 50114 1004/ 13060 1/014 21223 32222
UMAGF 31523 50114 0000/ 13002 1/012 24213 32233
#--------------------------------------------------------------------#
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Details

The Geoalert message starts with the code GEOALERT BRUXXX, where xxx is the day-of-the-year number.
Besides the ISES codes like UGEOA, UGEOI, UGEOR and USSPS, this message contains the following information:
PLAIN
PREDICTIONS FOR "today" : 10CM FLUX: xxx / AP: xxx
PREDICTIONS FOR "today+1": 10CM FLUX: xxx / AP: xxx
PREDICTIONS FOR "today+2": 10CM FLUX: xxx / AP: xxx
99999
This gives the predicted 10.7 cm radioflux and the predicted Ap index for 3 days starting on the date of the message
NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX END LOC XRAY OP 10CM TYPE Catania NOAA NOTE

This is the header of a table that lists all major events.
DAY gives the day-of-the-month.
BEGIN, MAX and END give the UT time of the different phases of the X-ray output of the event.
LOC gives the location of the event in heliographic coordinates.
XRAY gives the GOES X-ray class of the event.
OP lists the optical flare class.
10cm gives the 10.7 cm radioflux output of the event.
TYPE specifies the type of radiobursts observed.
Catania gives the Catania sunspot group number where the event happened.
NOAA is the corresponding NOAA active region number.
NOTE is the header of any other type of information, e.g. if a CME was observed associated with the event.


Check the ISES code book for information on ISES codes.