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: 2020 Jan 26 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 00126
SIDC SOLAR BULLETIN 26 Jan 2020, 1230UT
SIDC FORECAST (valid from 1230UT, 26 Jan 2020 until 28 Jan 2020)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 26 Jan 2020  10CM FLUX: 074 / AP: 003
PREDICTIONS FOR 27 Jan 2020  10CM FLUX: 074 / AP: 003
PREDICTIONS FOR 28 Jan 2020  10CM FLUX: 075 / AP: 004
COMMENT: Solar activity was at very low levels. No significant flares have
been recorded. NOAA Active Region 2757 (N03E09) showed some sunspot growth
and continued flux emergence and produced A-flaring activity over the
period (GOES-16). Another active region with possible spot development has
also rotated over the eastern limb (S30E70).
A very slow and narrow Coronal Mass Ejection (CME) that may be Earth
directed was observed by STEREO-A at 17:54 Jan 25, possibly associated with
an extended A-flare at 15:00 from AR2757. There are currently no LASCO
observations for this time, however, due to the extremely slow speed it is
not expected to have a significant geomagnetic impact. Further analysis
will be carried out as the data becomes available. 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 was at background levels, ranging between 260 and 350
km/s (ACE). The total magnetic field fluctuated between 0 and 7 nT. Bz. The
interplanetary magnetic field (phi angle) was predominantly directed away
from the Sun (positive sector).

Geomagnetic activity was quiet, with the Kp index (NOAA) and the local k
index (Dourbes) recording values of between 0 and 2. Quiet conditions are
expected on Jan 26-28.

TODAY'S ESTIMATED ISN  : 020, BASED ON 13 STATIONS.

SOLAR INDICES FOR 25 Jan 2020
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 073
AK CHAMBON LA FORET    : 005
AK WINGST              : 002
ESTIMATED AP           : 002
ESTIMATED ISN          : 011, BASED ON 09 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.