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: 2018 May 24 1316 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 80524
SIDC SOLAR BULLETIN 24 May 2018, 1315UT
SIDC FORECAST (valid from 1230UT, 24 May 2018 until 26 May 2018)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 24 May 2018  10CM FLUX: 073 / AP: 004
PREDICTIONS FOR 25 May 2018  10CM FLUX: 072 / AP: 006
PREDICTIONS FOR 26 May 2018  10CM FLUX: 073 / AP: 007
COMMENT: Newly numbered Catania sunspot group 84 rotating around the East
limb produced multiple B flares yesterday. The largest flare was a C2.0
flare peaking at 18:21 UT. NOAA Active Regions 2710 and 2711 were mostly
inactive. No earth-directed coronal mass ejections (CMEs) were observed in
available coronagraphic imagery. The greater than 10 MeV proton flux was at
nominal levels. Solar activity is expected to be at low levels with some
probability for C-class flares.
Solar wind parameters decreasing varitations indicate fainting influence of
positive polarity extension of the northern polar coronal hole. Solar wind
speed gradually decreased during the period till around 470 km/s after
reaching maximum of 550 km/s at 17:00 UT yesterday. Total magnetic field
magnitude declined from 6.5 to 2 nT, while Bz component is varying now
between -1.7 and +1.7 nT. Geomagnetic conditions reached unsettled levels
(K= 3) during 06 - 15 UT yesterday, then both local index (Dourbes) and
planetary (NOAA) returned to quiet levels. Mainly quiet geomgnetic
conditions can be expected from now.
TODAY'S ESTIMATED ISN  : 035, BASED ON 22 STATIONS.

SOLAR INDICES FOR 23 May 2018
WOLF NUMBER CATANIA    : 031
10CM SOLAR FLUX        : 073
AK CHAMBON LA FORET    : 012
AK WINGST              : 010
ESTIMATED AP           : 012
ESTIMATED ISN          : 027, 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.