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 Dec 06 1231 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 91206
SIDC SOLAR BULLETIN 06 Dec 2019, 1230UT
SIDC FORECAST (valid from 1230UT, 06 Dec 2019 until 08 Dec 2019)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 06 Dec 2019  10CM FLUX: 070 / AP: 002
PREDICTIONS FOR 07 Dec 2019  10CM FLUX: 071 / AP: 003
PREDICTIONS FOR 08 Dec 2019  10CM FLUX: 070 / AP: 005
COMMENT: Solar activity was at very low levels. The visible solar disk was
spotless. No earth-directed coronal mass ejections (CMEs) have been
observed in the available coronagraphic imagery. The greater than 10 MeV
proton flux was at nominal values. Solar activity is expected to remain at
very low levels.

The solar wind speed gradually increased from 320 km/s to 390 km/s (ACE).
The interplanetary magnetic field (phi angle) was predominantly directed
towards the Sun (negative sector), with some short intervals in the
positive sector.  Bz varied between -4 and +4 nT.

Geomagnetic activity was quiet, with the Kp index (NOAA) and the local k
index (Dourbes) recording values of between 0-2. Quiet conditions are
expected on Dec 6 and 7 with possible unsettled conditions from Dec 8, due
to the influence from the patchy negative polarity coronal hole that
traversed the central meridian on Dec 5.

TODAY'S ESTIMATED ISN  : 000, BASED ON 07 STATIONS.

SOLAR INDICES FOR 05 Dec 2019
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 071
AK CHAMBON LA FORET    : 005
AK WINGST              : 002
ESTIMATED AP           : 002
ESTIMATED ISN          : 000, BASED ON 20 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.