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 Feb 19 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 90219
SIDC SOLAR BULLETIN 19 Feb 2019, 1230UT
SIDC FORECAST (valid from 1230UT, 19 Feb 2019 until 21 Feb 2019)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Active conditions expected (A>=20 or K=4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 19 Feb 2019  10CM FLUX: 070 / AP: 005
PREDICTIONS FOR 20 Feb 2019  10CM FLUX: 070 / AP: 018
PREDICTIONS FOR 21 Feb 2019  10CM FLUX: 070 / AP: 012
COMMENT: Solar activity was at very low levels. The 15-degrees long
filament in former active region NOAA 2733 is stable and currently located
near N10E15. No earth-directed coronal mass ejections were observed over
the last 24 hours. The greater than 10 MeV proton flux was at nominal
values.

Solar activity is expected to remain at very low levels.

Solar wind speed showed a generally declining trend from 370 km/s at the
beginning of the period to 330 km/s at the end (DSCOVR). Bz ranged between
-3 and +3 nT. The interplanetary magnetic field was predominately directed
towards the Sun (negative sector). Geomagnetic activity was at quiet
levels.

Mostly quiet geomagnetic conditions are expected until the arrival of the
co-rotating interaction region and wind stream from the positive polarity
coronal hole later today or on 20 February. This may result in active
conditions, with a small chance on an isolated minor storming episode.

TODAY'S ESTIMATED ISN  : 000, BASED ON 23 STATIONS.

SOLAR INDICES FOR 18 Feb 2019
WOLF NUMBER CATANIA    : 000
10CM SOLAR FLUX        : 070
AK CHAMBON LA FORET    : 008
AK WINGST              : 007
ESTIMATED AP           : 006
ESTIMATED ISN          : 000, BASED ON 31 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.