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: 2014 Apr 23 1228 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 40423
SIDC SOLAR BULLETIN 23 Apr 2014, 1204UT
SIDC FORECAST (valid from 1230UT, 23 Apr 2014 until 25 Apr 2014)
SOLAR FLARES  : Eruptive (C-class flares expected, probability >=50%)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 23 Apr 2014  10CM FLUX: 138 / AP: 003
PREDICTIONS FOR 24 Apr 2014  10CM FLUX: 134 / AP: 005
PREDICTIONS FOR 25 Apr 2014  10CM FLUX: 132 / AP: 005
COMMENT: Only 5 low-level C-class flares were recorded over the last 24
hours. Active regions NOAA 2038 (2), 2035 (1) and 2034 (2, from behind the
west limb) were the sources. A CME first visible in LASCO/C2 at 15:12UT
originated from a filament eruption in the northeast solar quadrant.
Another CME, first visible in LASCO/C2 at 16:36UT, was related to a
backside solar flare. None of these CMEs has an earth-directed component.
Further C-class flaring is expected.   Solar wind speed has been varying
between 400 and 450km/s, with Bz between -4 and +2nT. A small equatorial
coronal hole will reach the central meridian tonight. The geomagnetic field
may be impacted around 27 April.    Geomagnetic conditions have been quiet,
and are expected to remain so.
TODAY'S ESTIMATED ISN  : 063, BASED ON 17 STATIONS.

SOLAR INDICES FOR 22 Apr 2014
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 145
AK CHAMBON LA FORET    : 007
AK WINGST              : 004
ESTIMATED AP           : 003
ESTIMATED ISN          : 095, BASED ON 23 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.