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 tot

Latest issue

:Issued: 2019 May 21 1230 UTC
:Product: documentation at http://www.sidc.be/products/tot
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
#--------------------------------------------------------------------#
SIDC URSIGRAM 90521
SIDC SOLAR BULLETIN 21 May 2019, 1230UT
SIDC FORECAST (valid from 1230UT, 21 May 2019 until 23 May 2019)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 21 May 2019  10CM FLUX: 069 / AP: 007
PREDICTIONS FOR 22 May 2019  10CM FLUX: 068 / AP: 007
PREDICTIONS FOR 23 May 2019  10CM FLUX: 068 / AP: 004
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. 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 355 and 450 km/s over the past
24 hours. The total magnetic field strength fluctuated around 5 nT for much
of the period, with a minimum of 0.6 nT and a maximum of 7.1 nT recorded.
The Bz component was predominantly positive and ranged between -4.8 and
+7.1 nT.

Geomagnetic conditions have been quiet to unsettled over the past 24 hours,
with Kp index (NOAA) and local K index (Dourbes) ranging between 1-2 and
1-3, respectively. Quiet to unsettled geomagnetic conditions are expected
to continue over the next 24 hours, due to the weak solar wind stream
associated with the patchy negative polarity equatorial coronal hole which
began to traverse the central meridian on 18 May.

TODAY'S ESTIMATED ISN  : 000, BASED ON 21 STATIONS.
99999

SOLAR INDICES FOR 20 May 2019
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 069
AK CHAMBON LA FORET    : 008
AK WINGST              : 008
ESTIMATED AP           : 007
ESTIMATED ISN          : 000, BASED ON 20 STATIONS.

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

UMAGF 30503 90521 1004/ 20067 1/008 21111 31112
UMAGF 31523 90521 0000/ 20002 1/008 24211 32211
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.
Besides the ISES codes like UMAGF, UCOSE and USSPS,
this message contains a forecast 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.