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 Apr 20 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU110
UGEOA 30512 90420 1230/ 9930/ 
10202 20202 30202 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 20 Apr 2019 until 22 Apr
2019
PREDICTIONS FOR 20 Apr 2019  10CM FLUX: 070 / AP: 005
PREDICTIONS FOR 21 Apr 2019  10CM FLUX: 070 / AP: 003
PREDICTIONS FOR 22 Apr 2019  10CM FLUX: 070 / AP: 003
COMMENT: Solar activity was at very low levels. While rounding the west
limb, NOAA 2738 produced 4 B-class flares, the strongest being a B8 flare
peaking at 00:50UT. The lone sunspot group currently visible on the solar
disk, NOAA 2739, was quiet and is decaying. No earth-directed coronal mass
ejections were observed over the last 24 hours. The greater than 10 MeV
proton flux was at nominal values. An equatorial negative polarity coronal
hole (CH) is transiting the central meridian.

Solar activity is expected to remain at very low levels.

Solar wind speed was fairly steady between 300 and 350 km/s (DSCOVR). Bz
varied between -4 and +6 nT. The interplanetary magnetic field was mostly
directed away from the Sun (positive sector) until about 07:00UT, when it
switched back to towards the Sun (negative sector). Geomagnetic conditions
were at quiet levels, with an isolated unsettled interval (14-17UT)
recorded at Dourbes.

Quiet geomagnetic conditions are expected to continue, with a chance on an
unsettled interval.

TODAY'S ESTIMATED ISN  : 012, BASED ON 26 STATIONS.
99999
UGEOI 30512 90420 1230/ 19/// 
1//// 20730 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 90420 1230/ 18/06 20102 
10014 2//// 3//// 4201/ 50020 60005 42405 00000 
99999
USSPS 81202 18049 02432 09022 46303 4/802 10003 42504 11302
USSPS 21305 18160 02332 08006 47106 4/801 09002 43106 01202
USSPS 32404 19053 02332 11024 47906 4/801 12001 43805 11402
UMAGF 30503 90420 1004/ 19060 1/009 21221 32111
#--------------------------------------------------------------------#
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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.