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 18 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU077
UGEOA 30512 90318 1230/ 9930/ 
10182 21182 30182 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 18 Mar 2019 until 20 Mar
2019
PREDICTIONS FOR 18 Mar 2019  10CM FLUX: 069 / AP: 005
PREDICTIONS FOR 19 Mar 2019  10CM FLUX: 070 / AP: 011
PREDICTIONS FOR 20 Mar 2019  10CM FLUX: 071 / AP: 007
COMMENT: There are no active regions visible on the solar disk. No C-class
flares in past 24 h. Solar activity is expected to remain at very low
levels.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar
protons have remained at background levels over the past 24 hours.

The solar wind speed is at 350 km/s with interplanetary magnetic fields of
5 nT. Geomagnetic conditions have been quiet to unsettled (K = 1 - 3) in
the past 24 h. A relatively long magnetic field with low variability
together with low temperature could have marked the arrival yesterday of
the March 12 CME. The effect of a high speed stream from a small equatorial
coronal hole, with positive magnetic field polarity, may reach the Earth in
about 24 h and cause up to active geomagnetic storm conditions (K = 4).

TODAY'S ESTIMATED ISN  : 013, BASED ON 17 STATIONS.
99999
UGEOI 30512 90318 1230/ 17/// 
1//// 20690 3015/ 4//// 8//// 9//// 
99999

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

UGEOR 30512 90318 1230/ ///// ///// 
99999
UMAGF 30503 90318 1004/ 17063 1/011 23212 32101
UMAGF 31523 90318 0000/ 17006 1/015 25333 31321
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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.