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: 2018 Jun 20 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU171
UGEOA 30512 80620 1230/ 9930/ 
10202 20202 30202 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 20 Jun 2018 until 22 Jun
2018
PREDICTIONS FOR 20 Jun 2018  10CM FLUX: 078 / AP: 004
PREDICTIONS FOR 21 Jun 2018  10CM FLUX: 079 / AP: 005
PREDICTIONS FOR 22 Jun 2018  10CM FLUX: 079 / AP: 005
COMMENT: The solar activity has been quiet over the past 24 hours with
X-ray flux remaining below C level. Catania sunspot group 86 and 87 (NOAA
active region 2713 and 2714) remained stable and produced only small
B-class flares. A new sunspot (Catania sunspot group 88, NOAA active region
2715) has recently emerged and produced only a small B-class flare. Flaring
conditions are expected to remain quiet for the next 24-hour period with a
small chance of C-class flare.

No Earth directed Coronal Mass Ejection has been observed. The greater than
10 MeV solar protons flux remained at nominal levels over the past 24 hours
and is expected to remain so.

The Earth remained under the influence of the solar wind associated with
the coronal hole, which passed the central meridian on Jun 15. The wind
speed values fluctuated between 480 to 520 km/s, and is currently
decreasing to reach 428 km/s. The interplanetary magnetic field is at its
nominal condition with the total magnetic field strength below 5 nT and the
southward component fluctuating between -3.5 and +4.5 nT. Solar wind
conditions are expected to return to the slow regime within the next two
days. A north pole coronal hole of positive polarity and extending to
latitude 25 deg. is currently passing through the central meridian. The
associated fast solar wind would reach Earth on the 23rd of June.

Geomagnetic conditions have been mostly quiet over the past 24 hours. The
Kp index (NOAA) ranged between 1-2 and local K index 0-3 (Dourbes). The
geomagnetic conditions are expected to remained quiet for the next period.

TODAY'S ESTIMATED ISN  : 055, BASED ON 15 STATIONS.
99999
UGEOI 30512 80620 1230/ 19/// 
10042 20770 3//// 4//// 80102 90070 
99999

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

UGEOR 30512 80620 1230/ 20/07 20103 
10086 2//// 3//// 4201/ 50040 60015 42705 00000 
10087 2//// 3//// 4321/ 50040 60005 45708 01000 
10088 2//// 3//// 4422/ 50130 60016 12808 01000 
99999
USSPS 31405 20070 06642 86004 42705 01215 87004 45708 22305 88013 12808
24416
USSPS 32404 17058 01532 24001 11306 01205
USSPS 21305 18157 03542 29016 40605 01210 30011 43610 01205
USSPS 81202 19021 02622 26005 44108 01204 25002 41105 01202
UMAGF 30503 80620 1004/ 19068 1/008 22211 31111
#--------------------------------------------------------------------#
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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.