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 Mar 24 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU083
UGEOA 30512 90324 1230/ 9930/ 
10242 22242 30242 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 24 Mar 2019 until 26 Mar
2019
PREDICTIONS FOR 24 Mar 2019  10CM FLUX: 079 / AP: 008
PREDICTIONS FOR 25 Mar 2019  10CM FLUX: 076 / AP: 013
PREDICTIONS FOR 26 Mar 2019  10CM FLUX: 072 / AP: 007
COMMENT: NOAA AR 2736 has decreased in size and complexity (it has now beta
magnetic field configuration) and did not produce anymore C-class flares in
the past 24 h. It did produce many B-class flares, including a B9.9 peaking
at 23:59 UT on March 23. The region is now rotating over the west limb,
C-class flares remain possible but less likely.

No Earth directed CMEs in past 24 h. Solar protons have remained at
background levels over the past 24 hours.

The solar wind speed is 265 km/s with interplanetary magnetic fields of 3
nT. The CME from March 20, expected to arrive yesterday (with 50%
probability) has not done so yet. It may have been slowed down by the very
slow solar wind that we are seeing now (in that case it could arrive
today), or it may have missed the Earth. The fast solar wind emanating from
a negative polarity equatorial coronal hole may affect the Earth in 48 h.
Quiet conditions were observed in the past hours,  the situation will
change only if the CME arrives, in that case  K up to 5 can be expected.

TODAY'S ESTIMATED ISN  : 017, BASED ON 24 STATIONS.
99999
UGEOI 30512 90324 1230/ 23/// 
1//// 20790 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 90324 1230/ ///// ///// 
99999
USSPS 32404 22064 02832 09017 45208 24518
USSPS 21305 22149 02342 06042 46709 51513
UMAGF 30503 90324 1004/ 23065 1/003 20110 30000
#--------------------------------------------------------------------#
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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.