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 Nov 11 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 91111
SIDC SOLAR BULLETIN 11 Nov 2019, 1230UT
SIDC FORECAST (valid from 1230UT, 11 Nov 2019 until 13 Nov 2019)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 11 Nov 2019  10CM FLUX: 071 / AP: 012
PREDICTIONS FOR 12 Nov 2019  10CM FLUX: 070 / AP: 007
PREDICTIONS FOR 13 Nov 2019  10CM FLUX: 069 / AP: 004
COMMENT: Solar activity was at very low levels, no significant flares have
been recorded. The Sun remained 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 fluctuated around 310 km/s until 00:00 UT November 11, when
it began to gradually increase reaching a maximum of 370 km/s (ACE). The
total magnetic field initially fluctuated between 0 and 5 nT and then from
05:00 UT November 11 gradually increased to values up to 11 nT. Bz was
predominantly negative from 00:00 UT and reached a minimum value of -11 nT.
Geomagnetic activity was quiet for the first part of the period, following
which unsettled to active conditions were observed (Kp = 3 and local k
index Dourbes = 4) due to an extended period of strong negative Bz.

Unsettled conditions are expected over the next 48 hours due to the
influence of a negative polarity coronal hole.
TODAY'S ESTIMATED ISN  : 000, BASED ON 12 STATIONS.

SOLAR INDICES FOR 10 Nov 2019
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 071
AK CHAMBON LA FORET    : 004
AK WINGST              : 002
ESTIMATED AP           : 002
ESTIMATED ISN          : 000, BASED ON 28 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.