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: 2022 Aug 13 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU225
UGEOA 30512 20813 1230/ 9930/ 
11132 20132 30132 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 13 Aug 2022 until 15 Aug
2022
PREDICTIONS FOR 13 Aug 2022  10CM FLUX: 122 / AP: 009
PREDICTIONS FOR 14 Aug 2022  10CM FLUX: 124 / AP: 010
PREDICTIONS FOR 15 Aug 2022  10CM FLUX: 122 / AP: 007
COMMENT: Several C flares occurred in the past 24 hours. Most of them from
the newly emerged NOAA active region 3079 in the South as reported
yesterday. The strongest flare was a C6.8 flare peaking at 7:31UTC.
This bipolar region developed a dominant trailing spot and exhibits mixed
polarity field in the intermediate area. The unipolar active regions NOAA
3071 and 3074 were stable while unipolar region NOAA 3078 showed some
growth and became bipolar. The bipolar NOAA active region 3077 has decayed
just as the newly numbered NOAA active region 3080 which was shortlived.
The now bipolar region NOAA 3076 in the north has grown following the new
flux emergence reported yesterday. Another bipolar region has recently
emerged rapidly in the north east (NOAA active region 3081).
All in all, C class flaring is very likely with now also chances for M
class flaring.

No Earth-directed coronal mass ejections (CMEs) were detected in the
available coronagraph imagery.

The greater than 10 MeV proton flux was at nominal levels in the past 24
hours and is expected to remain so in the next days.
The greater than 2 MeV electron flux remained above the 1000 pfu threshold
and is expected to remain above or around the threshold in the next 24
hours.
The 24h electron fluence was at moderate levels and is expected to be at
moderate levels with a slow decreasing trend.

Declining high speed Solar wind conditions were recorded. Solar wind speed
decreased from around 575 to just over 500 km/s while the interplanetary
magnetic field strength varied around 5nT. The magnetic field orientation
showed mostly a connection to a positive sector (field away from the Sun).
Over the next 24 hours Solar wind speed is expected to continue the
decreasing trend and slowly return towards slow Solar wind conditions.

Geomagnetic conditions were quiet to unsettled (both local K Dourbes and
NOAA Kp 1-3).
Geomagnetic conditions are expected to be quiet to unsettled over the next
days.
TODAY'S ESTIMATED ISN  : 126, BASED ON 19 STATIONS.
99999
UGEOI 30512 20813 1230/ 12/// 
1//// 21200 3//// 4//// 8//// 9//// 
99999

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

UGEOR 30512 20813 1230/ 11/09 13105 
10003 2//// 3//// 472// 50100 60001 34217 00000 
10006 2//// 3//// 472// 50150 60001 30615 00000 
10008 2//// 3//// 4442/ 50180 60014 12318 03000 
10009 2//// 3//// 4311/ 50050 60013 32817 01000 
10010 2//// 3//// 472// 50040 60002 25324 01000 
99999
USSPS 81202 12049 10332 77014 35216 2/801 83004 33816 01205 80015 31516
2/801 87003 30311 01206 84005 24226 2/801 86002 26011 0/101 82017 11515
2/806 85002 42621 01202
USSPS 31405 11096 08132 03010 34217 2/801 06015 30615 2/801 08018 12318
44414 09005 32817 11313 10004 25324 2/802
UMAGF 30503 20813 1004/ 12065 1/012 22321 31112
#--------------------------------------------------------------------#
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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.