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: 2018 Apr 25 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 80425
SIDC SOLAR BULLETIN 25 Apr 2018, 1230UT
SIDC FORECAST (valid from 1230UT, 25 Apr 2018 until 27 Apr 2018)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Active conditions expected (A>=20 or K=4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 25 Apr 2018  10CM FLUX: 073 / AP: 010
PREDICTIONS FOR 26 Apr 2018  10CM FLUX: 074 / AP: 017
PREDICTIONS FOR 27 Apr 2018  10CM FLUX: 074 / AP: 007
COMMENT: There is one active region on the disc, NOAA AR 2706 with beta
magnetic field configuration. No C-class flares in past 24 h, but they
remain possible.

No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar
protons have remained at background levels over the past 24 h.

The solar wind speed at L1 is at 350 km /s with interplanetary magnetic
field magnitude of 5 nT. Geomagnetic conditions are quiet, the fast solar
wind related to the southern extension of the northern polar coronal hole
can affect the Earth in about 24 h and cause active geomagnetic conditions
(although it may pass north of the Earth).


TODAY'S ESTIMATED ISN  : 017, BASED ON 22 STATIONS.

SOLAR INDICES FOR 24 Apr 2018
WOLF NUMBER CATANIA    : 029
10CM SOLAR FLUX        : 073
AK CHAMBON LA FORET    : 012
AK WINGST              : 006
ESTIMATED AP           : 005
ESTIMATED ISN          : 020, BASED ON 24 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.