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 27 1250 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 70227
SIDC SOLAR BULLETIN 27 Feb 2017, 1249UT
SIDC FORECAST (valid from 1230UT, 27 Feb 2017 until 01 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 27 Feb 2017  10CM FLUX: 078 / AP: 007
PREDICTIONS FOR 28 Feb 2017  10CM FLUX: 077 / AP: 010
PREDICTIONS FOR 01 Mar 2017  10CM FLUX: 076 / AP: 016
COMMENT: Solar activity was very low with no C class flares. NOAA active
regions (ARs) 2638, 2639 and 2640 were stable. 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 is expected to become geoeffective around
midnight 28-Feb-2017/01-March-2017. Proton flux values are expected to
remain at background levels.
Solar wind speed declined from around 450 km/s to around 350 km/s. Total
magnetic field was in the 3:6nT range. Bz was in the -3:4nT range. Solar
wind is expected to be at nominal levels over the next 24 hours before an
anticipated increase late 28-Feb-2017 due to high speed stream from the
negative polarity coronal hole. Geomagnetic conditions have been quiet
(local K Dourbes 0-2, 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 28-Feb 2017 with the anticipated high speed stream.
TODAY'S ESTIMATED ISN  : 041, BASED ON 18 STATIONS.

SOLAR INDICES FOR 26 Feb 2017
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 079
AK CHAMBON LA FORET    : 006
AK WINGST              : 002
ESTIMATED AP           : 001
ESTIMATED ISN          : 032, BASED ON 19 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.