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: 2017 Nov 21 1307 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU325
UGEOA 30512 71121 1307/ 9930/ 
10212 21212 30212 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 21 Nov 2017 until 23 Nov
2017
PREDICTIONS FOR 21 Nov 2017  10CM FLUX: 074 / AP: 032
PREDICTIONS FOR 22 Nov 2017  10CM FLUX: 075 / AP: 015
PREDICTIONS FOR 23 Nov 2017  10CM FLUX: 074 / AP: 011
COMMENT: Over the past 24 hours solar activity has been quiet. No
significant flares have been recorded. All Active Regions (AR) have shown
low levels of activity. 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 with a low probability of C-class flares.

The solar wind speed been increasing from 300 and 600 km/s over the past 24
hours. The total magnetic field strength has fluctuated between 4 nT and 14
nT. The Bz component has fluctuated between positive and negative,
fluctuating between -13 and +14 nT. Geomagnetic conditions ranged between
Kp index 1-4 (NOAA) and local K index 1-4 (Dourbes) over the past 24 hours.
A positive polar coronal hole is currently positioned in the Western
hemisphere of the Sun and the resulting high-speed stream (HSS) has
enhanced solar wind speeds and as a consequence increased geo-activity
levels. Geomagnetic conditions are expected to remain unsettled throughout
the day, but should begin to return to quiet conditions at the end of the
day.
TODAY'S ESTIMATED ISN  : 000, BASED ON 12 STATIONS.
99999
UGEOI 30512 71121 1307/ 20/// 
10012 20740 3007/ 4//// 80001 90010 
99999

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

UGEOR 30512 71121 1307/ 20/08 21101 
10064 2//// 3//// 4201/ 50010 60002 46211 00000 
99999
UMAGF 30503 71121 1004/ 20066 1/026 21112 33444
UMAGF 31523 71121 0000/ 20009 1/007 21100 31234
#--------------------------------------------------------------------#
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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.