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: 2020 Jul 10 1230 UTC
:Product: documentation at http://www.sidc.be/products/xut
#--------------------------------------------------------------------#
# GEOALERT message from the SIDC (RWC-Belgium)                       #
#--------------------------------------------------------------------#
GEOALERT BRU192
UGEOA 30512 00710 1230/ 9930/ 
10102 20102 30102 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 10 Jul 2020 until 12 Jul
2020
PREDICTIONS FOR 10 Jul 2020  10CM FLUX: 069 / AP: 005
PREDICTIONS FOR 11 Jul 2020  10CM FLUX: 068 / AP: 003
PREDICTIONS FOR 12 Jul 2020  10CM FLUX: 068 / AP: 008
COMMENT: Solar activity was at very low levels and is expected to remain
so. SDO/HMI's latest white light images indicate some small spots are
developing in old active region NOAA 2766, located near N05W60.

The significant coronal mass ejection (CME) associated with the filament
eruption near the NW solar limb early on 09 July does not seem to have an
earth-directed component. The faint and slow-moving (250 km/s) CME
associated with a long-lasting filament eruption in the SW solar quadrant
was barely visible in SOHO's coronagraphic imagery. In view of its width
(about 110 degrees in LASCO/C2 at 09/13:25UT July) and the source location
near S30W15, there's a small chance on a glancing blow from this CME late
on 13 but more likely on 14 July. No other earth-directed coronal mass
ejections (CMEs) were observed in available coronagraphic imagery.

The greater than 10 MeV proton flux and the greater than 2 MeV electron
flux were at nominal levels during the last 24 hours and are expected to
remain so.

Solar wind speed varied between 300 and 340 km/s, ending the period near
330 km/s (DSCOVR). Bz varied between -4 and +4 nT, with a negative stretch
from 04-09UT. The direction of the interplanetary magnetic field (phi
angle) was mostly directed away from the Sun (positive sector).

Geomagnetic activity was at quiet levels, with an unsettled interval
(06-09UT) recorded by Dourbes. Geomagnetic conditions are expected to be
mostly quiet on 10-11 July. Unsettled intervals are possible on 12-13 July
from coronal hole wind stream effects, and on 14 July from a glancing blow
from the 09 July CME. An isolated active interval is not excluded.

TODAY'S ESTIMATED ISN  : 002, BASED ON 18 STATIONS.
99999
UGEOI 30512 00710 1230/ 09/// 
10000 20690 3004/ 4//// 80000 90000 
99999

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

UGEOR 30512 00710 1230/ ///// ///// 
99999
USSPS 31405 08085 00042
UMAGF 30503 00710 1004/ 09063 1/006 21112 31001
UMAGF 31523 00710 0000/ 09004 1/004 21111 32220
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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.