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 Feb 26 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 70226
SIDC SOLAR BULLETIN 26 Feb 2017, 1230UT
SIDC FORECAST (valid from 1230UT, 26 Feb 2017 until 28 Feb 2017)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 26 Feb 2017  10CM FLUX: 079 / AP: 005
PREDICTIONS FOR 27 Feb 2017  10CM FLUX: 078 / AP: 007
PREDICTIONS FOR 28 Feb 2017  10CM FLUX: 077 / AP: 014
COMMENT: Solar activity was very low with no significant flaring and X-ray
flux at background values.
NOAA region 2638 (Catania 95 and 96) and NOAA region 2639 (Catania 97) were
stable. Additional spot formation was recorded in Catania group 98 (now
numbered as NOAA region 2640).
X-ray flux is expected to remain at background level.
No Earth directed CMEs have been recorded in coronagraph data.
The transequatorial extension of the negative polarity southern polar
coronal hole has transited the central meridian overnight. It is expected
to become geoeffective around midnight February 28 / March 1.
Proton flux values are at background levels and expected to remain so.

Solar wind showed the continued recovery towards nominal conditions. Solar
wind speed declined from around 500 km/s to around 430 km/s. Total magnetic
field was in the 3-5nT range.
Solar wind is expected to be at nominal levels over the next 48 hours
before an anticipated increase late February 28 due to high speed stream
from the negative polarity coronal hole.
Geomagnetic conditions have been quiet to unsettled (local K Dourbes 0-3,
NOAA Kp 1-2).
Over the next days, geomagnetic conditions are expected to be quiet to
unsettled and increasing to quiet to active by late February 28 with the
anticipated high speed stream.
TODAY'S ESTIMATED ISN  : 033, BASED ON 09 STATIONS.

SOLAR INDICES FOR 25 Feb 2017
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 080
AK CHAMBON LA FORET    : 009
AK WINGST              : 008
ESTIMATED AP           : 008
ESTIMATED ISN          : 030, BASED ON 26 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.