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: 2015 Mar 27 1455 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 50327
SIDC SOLAR BULLETIN 27 Mar 2015, 1403UT
SIDC FORECAST (valid from 1230UT, 27 Mar 2015 until 29 Mar 2015)
SOLAR FLARES  : Eruptive (C-class flares expected, probability >=50%)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 27 Mar 2015  10CM FLUX: 136 / AP: 011
PREDICTIONS FOR 28 Mar 2015  10CM FLUX: 133 / AP: 008
PREDICTIONS FOR 29 Mar 2015  10CM FLUX: 130 / AP: 008
COMMENT: Only weak C-class flares were reported during last 24 hours,
despite the presence of the complex beta-gamma-delta active region (NOAA AR
2305) on the solar disc. The strongest reported flare C1.4 (peaking at
19:21 UT) on March 26 also originated from the Catania sunspot group
13(NOAA AR 2305) which started to decay and it currently has beta-gamma
configuration of its photospehric magnetic field. We expect C-class flares
in the coming hours. No Earth directed CMEs were observed during last 24
hours. The Earth is currently inside a slow solar wind with the speed of
about 410 km/s, and the interplanetary magnetic field is stable with the
magnitude of about 6nT. The sudden change of the magnetic field phi angle,
at about 14:30 UT on March 26 and its stable value since then, indicates
crossing of the sector boundary. The southern polar coronal hole is
strongly extended towards solar equator, up to about S35, and this part of
the coronal hole has reached the central meridian early today. The
associated fast flow might be expected at the Earth on March 30. The
geomagnetic conditions are quiet and expected to remain so in the coming
hours.
TODAY'S ESTIMATED ISN  : 075, BASED ON 12 STATIONS.

SOLAR INDICES FOR 26 Mar 2015
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 136
AK CHAMBON LA FORET    : 019
AK WINGST              : 012
ESTIMATED AP           : 011
ESTIMATED ISN          : 077, BASED ON 15 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.