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

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Latest issue

:Issued: 2019 May 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 90526
SIDC SOLAR BULLETIN 26 May 2019, 1230UT
SIDC FORECAST (valid from 1230UT, 26 May 2019 until 28 May 2019)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 26 May 2019  10CM FLUX: 067 / AP: 003
PREDICTIONS FOR 27 May 2019  10CM FLUX: 067 / AP: 007
PREDICTIONS FOR 28 May 2019  10CM FLUX: 068 / AP: 015
COMMENT: Over the past 24 hours solar activity has been very low. The
visible solar disc was spotless and no significant flares have been
recorded. 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 very low over the next 24 hours.

The solar wind was at background levels over the last 24 hours, gradually
increasing over the period from 300 km/s to 340 km/s. The total magnetic
field strength fluctuated between 0.2 and 4.9 nT. The Bz component ranged
between approximately -4 and +3.5 nT.

Geomagnetic conditions have been quiet to unsettled over the past 24 hours,
with Kp index (NOAA) ranging between 0-2 and local K index (Dourbes)
ranging between 0-2, with one short interval of K equal to 3 at 18 UT on 25
May. Quiet geomagnetic conditions are expected over the next 24 hours.
Active intervals (K Dourbes = 4) are possible on May 28, due to the
expected arrival of a high speed solar wind stream associated with a
recurring, negative polarity equatorial coronal hole which began to
traverse the central meridian on 24 May.

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

SOLAR INDICES FOR 25 May 2019
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 067
AK CHAMBON LA FORET    : 008
AK WINGST              : 006
ESTIMATED AP           : 004
ESTIMATED ISN          : 000, BASED ON 30 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.