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 Mar 25 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 70325
SIDC SOLAR BULLETIN 25 Mar 2017, 1230UT
SIDC FORECAST (valid from 1230UT, 25 Mar 2017 until 27 Mar 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 Mar 2017  10CM FLUX: 072 / AP: 008
PREDICTIONS FOR 26 Mar 2017  10CM FLUX: 072 / AP: 024
PREDICTIONS FOR 27 Mar 2017  10CM FLUX: 072 / AP: 024
COMMENT: In the past 24 hours, no C flares were observed. Very low solar
activity (no C flares) is expected in the next 24 hours.
Over the past 24 hours, solar wind speed measured by DSCOVR decreased from
about 570 to 495 km/s, while the magnitude of the Interplanetary Magnetic
Field (IMF) ranged between about 1 and 5 nT. This is indicative of a
transition to nominal solar wind conditions after the passage of the high
speed stream from a positive coronal hole. Quiet geomagnetic conditions (K
Dourbes between 1 and 2; NOAA Kp between 0 and 2) were registered in the
past 24 hours. Quiet to unsettled geomagnetic conditions (K Dourbes < 4)
are expected on March 25 and 26. The arrival of a high speed stream from a
large, recurrent coronal hole is expected on March 27. Consequently, active
geomagnetic conditions (K Dourbes = 4) are possible, with a chance for
minor geomagnetic storm intervals (K Dourbes = 5).
TODAY'S ESTIMATED ISN  : 016, BASED ON 24 STATIONS.

SOLAR INDICES FOR 24 Mar 2017
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 072
AK CHAMBON LA FORET    : 008
AK WINGST              : 006
ESTIMATED AP           : 005
ESTIMATED ISN          : 013, BASED ON 27 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.