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: 2017 Apr 27 1231 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 70427
SIDC SOLAR BULLETIN 27 Apr 2017, 1230UT
SIDC FORECAST (valid from 1230UT, 27 Apr 2017 until 29 Apr 2017)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 27 Apr 2017  10CM FLUX: 079 / AP: 010
PREDICTIONS FOR 28 Apr 2017  10CM FLUX: 078 / AP: 009
PREDICTIONS FOR 29 Apr 2017  10CM FLUX: 078 / AP: 006
COMMENT: There are three active regions, all with alpha configuration of
the photospheric magnetic field, presently observed on the visible side
of the solar disc. Solar activity is low and only few B-class flares were
reported during last 24 hours. We expect solar flaring activity to remain
on the same level in the coming hours.
No Earth directed CMEs have been observed in the past 24 hours.

Solar wind speed decreased to value of about 450 km/s, and the
interplanetary magnetic field magnitude remains on the level of 5nT. During
last 48 hours geomagnetic conditions were mostly quiet to unsettled and we
expect them to stay so in the coming hours.


TODAY'S ESTIMATED ISN  : 026, BASED ON 19 STATIONS.

SOLAR INDICES FOR 26 Apr 2017
WOLF NUMBER CATANIA    : 046
10CM SOLAR FLUX        : 080
AK CHAMBON LA FORET    : 014
AK WINGST              : 010
ESTIMATED AP           : 010
ESTIMATED ISN          : 040, 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.