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 May 21 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU141
UGEOA 30512 90521 1230/ 9930/ 
10212 20212 30212 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 21 May 2019 until 23 May
2019
PREDICTIONS FOR 21 May 2019  10CM FLUX: 069 / AP: 007
PREDICTIONS FOR 22 May 2019  10CM FLUX: 068 / AP: 007
PREDICTIONS FOR 23 May 2019  10CM FLUX: 068 / AP: 004
COMMENT: Over the past 24 hours solar activity has been low. The visible
solar disc was spotless and the X-ray flux remained below B-class level. No
Earth directed Coronal Mass Ejections (CMEs) have been detected. The
greater than 10MeV proton flux remained at background levels over the past
24 hours. Solar activity is expected to remain low over the next 24 hours.

The solar wind speed has fluctuated between 355 and 450 km/s over the past
24 hours. The total magnetic field strength fluctuated around 5 nT for much
of the period, with a minimum of 0.6 nT and a maximum of 7.1 nT recorded.
The Bz component was predominantly positive and ranged between -4.8 and
+7.1 nT.

Geomagnetic conditions have been quiet to unsettled over the past 24 hours,
with Kp index (NOAA) and local K index (Dourbes) ranging between 1-2 and
1-3, respectively. Quiet to unsettled geomagnetic conditions are expected
to continue over the next 24 hours, due to the weak solar wind stream
associated with the patchy negative polarity equatorial coronal hole which
began to traverse the central meridian on 18 May.

TODAY'S ESTIMATED ISN  : 000, BASED ON 21 STATIONS.
99999
UGEOI 30512 90521 1230/ 20/// 
1//// 20690 3008/ 4//// 8//// 9//// 
99999

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

UGEOR 30512 90521 1230/ ///// ///// 
99999
USSPS 31405 21060 00042
UMAGF 30503 90521 1004/ 20067 1/008 21111 31112
UMAGF 31523 90521 0000/ 20002 1/008 24211 32211
#--------------------------------------------------------------------#
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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.