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: 2017 Nov 21 1308 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 71121
SIDC SOLAR BULLETIN 21 Nov 2017, 1307UT
SIDC FORECAST (valid from 1230UT, 21 Nov 2017 until 23 Nov 2017)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Active conditions expected (A>=20 or K=4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 21 Nov 2017  10CM FLUX: 074 / AP: 032
PREDICTIONS FOR 22 Nov 2017  10CM FLUX: 075 / AP: 015
PREDICTIONS FOR 23 Nov 2017  10CM FLUX: 074 / AP: 011
COMMENT: Over the past 24 hours solar activity has been quiet. No
significant flares have been recorded. All Active Regions (AR) have shown
low levels of activity. 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 with a low probability of C-class flares.

The solar wind speed been increasing from 300 and 600 km/s over the past 24
hours. The total magnetic field strength has fluctuated between 4 nT and 14
nT. The Bz component has fluctuated between positive and negative,
fluctuating between -13 and +14 nT. Geomagnetic conditions ranged between
Kp index 1-4 (NOAA) and local K index 1-4 (Dourbes) over the past 24 hours.
A positive polar coronal hole is currently positioned in the Western
hemisphere of the Sun and the resulting high-speed stream (HSS) has
enhanced solar wind speeds and as a consequence increased geo-activity
levels. Geomagnetic conditions are expected to remain unsettled throughout
the day, but should begin to return to quiet conditions at the end of the
day.
TODAY'S ESTIMATED ISN  : 000, BASED ON 12 STATIONS.

SOLAR INDICES FOR 20 Nov 2017
WOLF NUMBER CATANIA    : 012
10CM SOLAR FLUX        : 074
AK CHAMBON LA FORET    : 026
AK WINGST              : 007
ESTIMATED AP           : 007
ESTIMATED ISN          : 000, BASED ON 15 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.