SIDC Ursigram

3-day-forecast of solar and geomagnetic activity.
Source SIDC (RWC-Belgium)
Frequency Daily
Format Encoded data (ISES)
Mail header SIDC Ursigram
SIDC code meu

Archive

Latest issue

:Issued: 2019 Oct 23 1230 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 91023
SIDC SOLAR BULLETIN 23 Oct 2019, 1230UT
SIDC FORECAST (valid from 1230UT, 23 Oct 2019 until 25 Oct 2019)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Minor storm expected (A>=30 or K=5)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 23 Oct 2019  10CM FLUX: 066 / AP: 005
PREDICTIONS FOR 24 Oct 2019  10CM FLUX: 066 / AP: 047
PREDICTIONS FOR 25 Oct 2019  10CM FLUX: 066 / AP: 028
COMMENT: Solar X ray flux remained below B level throughout the period.
There are no active regions on disk and X-ray flux is expected to remain at
background levels.

The filament eruption reported yesterday did not have any noticeable CME
associated.
No Earth-directed CME's were detected in coronagraph images.

Solar high energy proton fluxes were at background levels and are expected
to remain so.

Solar wind conditions were nominal, with Solar wind speed around 350 km/s
throughout the period and total magnetic field under 5nT. The magnetic
field phi angle was in the negative sector.
Solar wind is expected to increase significantly by tomorrow noon October
24 due to the recurrent high speed stream from an equatorial positive
polarity coronal hole.

Geomagnetic conditions were quiet (NOAA Kp 0-1 and local K Dourbes 0-2).
Geomagnetic conditions are expected to reach active levels with periods of
minor geomagentic storming associated to the expected high speed stream.
There is a chance that moderate storm levels (K=6) be reached.
TODAY'S ESTIMATED ISN  : 000, BASED ON 17 STATIONS.

SOLAR INDICES FOR 22 Oct 2019
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 066
AK CHAMBON LA FORET    : 006
AK WINGST              : 003
ESTIMATED AP           : 003
ESTIMATED ISN          : 000, BASED ON 27 STATIONS.

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

BT
#--------------------------------------------------------------------#
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Details

The SIDC ursigram starts with the code SIDC URSIGRAM YMMDD, where
Y is the last digit of the year number,
MM is the number of the month,
DD is the day of the month.

A forecast is given on:
the global flare probability,
geomagnetic disturbances,
solar proton events.
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
COMMENT
ESTIMATED ISN : xxx, based on xx stations.
where ISN stands for International Sunspot Number.

OBSERVED SOLAR INDICES FOR THE DAY BEFORE
SUNSPOT INDEX : xxx, the Wolf number observed by Catania
10CM SOLAR FLUX : xxx,
AK CHAMBON LA FORET : xxx,
AK WINGST : xxx,
ESTIMATED AP : xxx,
ESTIMATED ISN : xxx, based on xx stations.

NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX END LOC XRAY OP 10CM TYPE Catania NOAA NOTE

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.