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 Feb 18 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU049
UGEOA 30512 90218 1230/ 9930/ 
10182 21182 30182 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 18 Feb 2019 until 20 Feb
2019
PREDICTIONS FOR 18 Feb 2019  10CM FLUX: 070 / AP: 008
PREDICTIONS FOR 19 Feb 2019  10CM FLUX: 070 / AP: 014
PREDICTIONS FOR 20 Feb 2019  10CM FLUX: 070 / AP: 015
COMMENT: Solar activity was at very low levels. The Sun was spotless. A
10-degrees long filament in a spotless active region (former sunspot group
NOAA 2733) is currently located at N10E30. No coronal mass ejections were
observed over the last 24 hours. The greater than 10 MeV proton flux was at
nominal values. A diffuse and patchy positive polarity equatorial coronal
hole (CH) finished its transit of the central meridian yesterday 17
February.

Solar activity is expected to remain at very low levels.

Solar wind parameters were indicative of a small disturbance starting on 17
February around 15 UT. Wind speed varied mostly between 340 and 370 km/s
(DSCOVR). Bz ranged between -6 and +6 nT, with a 5-hour stretch of Bz
values near -5 nT centered around 00UT. The direction of the interplanetary
magnetic field (phi angle) was variable. Quiet to unsettled geomagnetic
conditions were observed.

Quiet to unsettled geomagnetic conditions are expected to continue, until
the arrival of the co-rotating interaction region and wind stream from the
positive polarity coronal hole on 19 or 20 February. This may result in
active conditions, with a small chance on an isolated minor storming
episode.

TODAY'S ESTIMATED ISN  : 000, BASED ON 23 STATIONS.
99999
UGEOI 30512 90218 1230/ 17/// 
1//// 20700 3005/ 4//// 8//// 9//// 
99999

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

UGEOR 30512 90218 1230/ ///// ///// 
99999
USSPS 31405 18070 00042
UMAGF 30503 90218 1004/ 17064 1/012 21100 32332
UMAGF 31523 90218 0000/ 17004 1/005 21011 30033
#--------------------------------------------------------------------#
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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.