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 Apr 27 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 50427
SIDC SOLAR BULLETIN 27 Apr 2015, 1230UT
SIDC FORECAST (valid from 1230UT, 27 Apr 2015 until 29 Apr 2015)
SOLAR FLARES  : Eruptive (C-class flares expected, probability >=50%)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 27 Apr 2015  10CM FLUX: 115 / AP: 005
PREDICTIONS FOR 28 Apr 2015  10CM FLUX: 112 / AP: 008
PREDICTIONS FOR 29 Apr 2015  10CM FLUX: 110 / AP: 012
COMMENT: Flaring activity was limited to one single C1.4 flare, originating
from NOAA active region 2331 (Catania sunspot group 37), peaking at 20:57
UT. Flaring at the minor C level is expected over the next few days. A
filament extending from N0E20 to N40E70 is currently crossing the solar
disk. No Earth directed CMEs were observed.        Earth is currently
inside a slow solar wind (speed in the range 300-350 km/s). The magnitude
of the interplanetary magnetic field (IMF) has slightly increased to 7nT,
with currently a negative Bz. The phi angle was mainly positive, but
turning to a negative orientation in the past few hours.  The flow
emanating from a recurrent equatorial coronal hole (currently crossing the
central meridian) is expected to arrive within two to three days, which
might result in an increased solar wind speed. Quiet to unsettled (local
K=0 to 3) geomagnetic conditions were observed and are expected to remain
so for the next 48 hours.
TODAY'S ESTIMATED ISN  : 037, BASED ON 18 STATIONS.

SOLAR INDICES FOR 26 Apr 2015
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 119
AK CHAMBON LA FORET    : 007
AK WINGST              : 002
ESTIMATED AP           : 002
ESTIMATED ISN          : 042, BASED ON 17 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.