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 Mar 30 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU089
UGEOA 30512 70330 1230/ 9930/ 
10302 22302 30302 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 30 Mar 2017 until 01 Apr
2017
PREDICTIONS FOR 30 Mar 2017  10CM FLUX: 082 / AP: 029
PREDICTIONS FOR 31 Mar 2017  10CM FLUX: 081 / AP: 016
PREDICTIONS FOR 01 Apr 2017  10CM FLUX: 081 / AP: 012
COMMENT: Over the past 24 hours solar activity has been low. There have
been six B-flares flares originated at NOAA AR 2644 (McIntosh: Eso;
Mag.Type: Beta), AR 2645 (McIntosh: Dsi; Mag.Type: Beta) and AR 2646
(McIntosh: Axx; Mag.Type: Alpha). The biggest flare B6.5 peaked yesterday
(29-Mar-2017) at 23:32 UT originated at NOAA AR 2644. No Earth-directed
CMEs have been detected over the past 24 hours. Solar protons have remained
at background levels over the past 24 hours. No Earth directed Coronal Mass
Ejections (CMEs) have been detected. Solar X-Ray background level is
expected to remain low. NOAA AR 2646 is about to rotate over the east limb.
NOAA AR 2645 and AR 2644 are expected to produce more B-class flares over
the next 24 hours. C-class flares are also not excluded.
Solar wind parameters indicate the influence of high speed stream (HSS)
from the recurrent negative polarity coronal hole that arrived at the Earth
27-Mar-2017. Total Interplanetary magnetic field remained stable varying
from 3 to 6 nT. The Bz component had two prolongated periods of negative
values varying from -6 nT to 5 nT over the past 24 hours. Solar wind speed
remained stable at high levels varying around 620 km/s. Solar wind speed is
expected to remain at high levels under CH HSS regime. WSA-Enlil model
simulations predict even more elevated solar wind speed  for the next two
days due to the global reconnection processes in near Earth space. The
geomagnetic field was from unsettled to active levels during the past 24
hours (K Dourbes between 1 and 3; NOAA Kp between 2 and 4) till 03:00 UT
this morning (30-Mar-2017), when NOAA Kp index reached minor storm levels
(Kp=5), at 06:00 UT Kp index returned to nominal value (Kp=3). The
geomagnetic field is expected to continue at active levels mostly for the
next two days with isolated episodes of minor storming (Kp=5) in response
to the agitated solar wind conditions.

TODAY'S ESTIMATED ISN  : 048, BASED ON 26 STATIONS.
99999
UGEOI 30512 70330 1230/ 29/// 
10071 20830 3022/ 4//// 80104 90440 
99999

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

UGEOR 30512 70330 1230/ 29/07 30104 
10008 2//// 3//// 4522/ 50280 60011 40112 02000 
10009 2//// 3//// 4422/ 50140 60016 23809 04100 
10007 2//// 3//// 4201/ 50010 60002 47707 00000 
10010 2//// 3//// 410// 50010 60002 42208 00000 
99999
USSPS 31405 30068 05342 08022 41212 24512 09021 22509 24421
USSPS 32404 28070 05032 30024 11513 34412 31000 46507 0/101 32007 25309
21407
USSPS 81202 29023 05042 28001 46906 0/101 27019 10412 24507 29019 24209
34412
UMAGF 30503 70330 1004/ 29066 1/031 23334 32433
UMAGF 31523 70330 0000/ 29000 1/022 24333 33534
#--------------------------------------------------------------------#
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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.