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 May 22 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 90522
SIDC SOLAR BULLETIN 22 May 2019, 1230UT
SIDC FORECAST (valid from 1230UT, 22 May 2019 until 24 May 2019)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 22 May 2019  10CM FLUX: 068 / AP: 006
PREDICTIONS FOR 23 May 2019  10CM FLUX: 068 / AP: 009
PREDICTIONS FOR 24 May 2019  10CM FLUX: 067 / AP: 006
COMMENT: Over the past 24 hours solar activity has been low. The visible
solar disc was spotless and the X-ray flux remained below B-class level. No
Earth directed Coronal Mass Ejections (CMEs) have been detected in the
available coronagraph imagery. The greater than 10MeV proton flux remained
at background levels over the past 24 hours. Solar activity is expected to
remain low over the next 24 hours.

The solar wind speed has fluctuated between around 345 and 405 km/s over
the past 24 hours. The total magnetic field strength fluctuated between 0.6
and 5 nT. The Bz component ranged between approximately -3 and +3 nT. The
phi angle was positive until 8 UT this morning (22 May) when it switched
into the negative sector.

Geomagnetic conditions have been quiet over the past 24 hours, with Kp
index (NOAA) and local K index (Dourbes) both ranging between 0 and 2.
Quiet to unsettled geomagnetic conditions are expected over the next 24
hours, due to the weak solar wind stream associated with a series of small
negative polarity coronal holes.

TODAY'S ESTIMATED ISN  : 000, BASED ON 19 STATIONS.

SOLAR INDICES FOR 21 May 2019
WOLF NUMBER CATANIA    : 000
10CM SOLAR FLUX        : 068
AK CHAMBON LA FORET    : 008
AK WINGST              : 004
ESTIMATED AP           : 004
ESTIMATED ISN          : 000, BASED ON 29 STATIONS.

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

BT
#--------------------------------------------------------------------#
# Solar Influences Data analysis Center - RWC Belgium                #
# Royal Observatory of Belgium                                       #
#                                                                    #
# Website         http://www.sidc.be.                                #
# E-mail          sidc-support@oma.be                                #
# To unsubscribe  http://www.sidc.be/registration/unsub.php          #
#                                                                    #
# Legal notices:                                                     #
# - Intellectual Property Rights:                                    #
#   http://www.astro.oma.be/common/internet/en/data-policy-en.pdf    #
# - Liability Disclaimer:                                            #
#   http://www.astro.oma.be/common/internet/en/disclaimer-en.pdf     #
# - Use and processing of your personal information:                 #
#   http://www.astro.oma.be/common/internet/en/privacy-policy-en.pdf #
#--------------------------------------------------------------------#

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.