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: 2017 Apr 25 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 70425
SIDC SOLAR BULLETIN 25 Apr 2017, 1230UT
SIDC FORECAST (valid from 1230UT, 25 Apr 2017 until 27 Apr 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 25 Apr 2017  10CM FLUX: 081 / AP: 014
PREDICTIONS FOR 26 Apr 2017  10CM FLUX: 079 / AP: 014
PREDICTIONS FOR 27 Apr 2017  10CM FLUX: 078 / AP: 008
COMMENT: There are three active regions, all with the simple configuration
of the photospheric magnetic field, presently observed on the visible side
of the solar disc. Solar activity is low with five low B-class and no
C-class flares reported during last 24 hours. We do not expect change in
the solar activity, and although C-class flares are possible, they are not
very probable.
No Earth directed CMEs have been observed and the solar protons remained at
background level in the past 24 hours.

The solar wind speed is slowly decreasing and it presently amounts 600
km/s. The interplanetary magnetic field magnitude is about 5nT. Due to the
influence of the fast solar wind, several intervals of the active
conditions were reported during last 24 hours (Dourbes reported K=4 and
NOAA Kp=4). The geomagnetic conditions are presently unsettled to active
and we expect them to stay so in the coming hours.
TODAY'S ESTIMATED ISN  : 041, BASED ON 20 STATIONS.

SOLAR INDICES FOR 24 Apr 2017
WOLF NUMBER CATANIA    : 050
10CM SOLAR FLUX        : 080
AK CHAMBON LA FORET    : 028
AK WINGST              : 020
ESTIMATED AP           : 024
ESTIMATED ISN          : 046, BASED ON 28 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.