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: 2019 Jun 15 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU166
UGEOA 30512 90615 1230/ 9930/ 
10152 20152 30152 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 15 Jun 2019 until 17 Jun
2019
PREDICTIONS FOR 15 Jun 2019  10CM FLUX: 068 / AP: 003
PREDICTIONS FOR 16 Jun 2019  10CM FLUX: 067 / AP: 003
PREDICTIONS FOR 17 Jun 2019  10CM FLUX: 067 / AP: 016
COMMENT: Solar activity was at very low levels. The solar disk was
spotless. No coronal mass ejections (CME) were observed over the last 24
hours. The greater than 10 MeV proton flux was at nominal values. A diffuse
and fragmented negative polarity equatorial coronal hole (CH) is transiting
the central meridian.

Solar activity is expected to remain at very low levels.

The earth environment is exiting the wind stream from the positive polarity
CH. Solar wind decreased from about 475 km/s to its current 380 km/s
(DSCOVR). Bz varied mostly between -4 and +3 nT. The interplanetary
magnetic field was mostly directed away from the Sun (positive sector).
Quiet geomagnetic conditions were observed.

Mostly quiet geomagnetic conditions are expected. The arrival of the wind
streams associated with the negative polarity CHs, currently expected for
17 June, may drive geomagnetic activity to active levels, with a minor
storming episode not excluded.

TODAY'S ESTIMATED ISN  : 000, BASED ON 17 STATIONS.
99999
UGEOI 30512 90615 1230/ 14/// 
1//// 20680 3007/ 4//// 8//// 9//// 
99999

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

UGEOR 30512 90615 1230/ ///// ///// 
99999
USSPS 31405 13060 00042
UMAGF 30503 90615 1004/ 14060 1/009 21221 31112
UMAGF 31523 90615 0000/ 14002 1/007 22222 33211
#--------------------------------------------------------------------#
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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.