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 Oct 19 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 81019
SIDC SOLAR BULLETIN 19 Oct 2018, 1230UT
SIDC FORECAST (valid from 1230UT, 19 Oct 2018 until 21 Oct 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 19 Oct 2018  10CM FLUX: 070 / AP: 008
PREDICTIONS FOR 20 Oct 2018  10CM FLUX: 070 / AP: 011
PREDICTIONS FOR 21 Oct 2018  10CM FLUX: 070 / AP: 007
COMMENT: There are no active regions visible on the solar disk. No C-class
flares in past 24 h. Solar activity is expected to remain at low levels.

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

The solar wind speed is at 320 km/s with interplanetary magnetic fields of
3 nT. Geomagnetic conditions have been quiet. The fast solar wind
associated with the low latitudinal extension of the northern polar coronal
hole (positive polarity) may arrive to the Earth within 24 h, causing
active geomagnetic conditions. Nevertheless, due to its latitude, the high
speed stream may pass north of the Earth and leave it unaffected (quiet
conditions expected in that case).

TODAY'S ESTIMATED ISN  : 000, BASED ON 21 STATIONS.

SOLAR INDICES FOR 18 Oct 2018
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 070
AK CHAMBON LA FORET    : 003
AK WINGST              : 001
ESTIMATED AP           : 001
ESTIMATED ISN          : 000, BASED ON 31 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.