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: 2020 Aug 05 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 00805
SIDC SOLAR BULLETIN 05 Aug 2020, 1230UT
SIDC FORECAST (valid from 1230UT, 05 Aug 2020 until 07 Aug 2020)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 05 Aug 2020  10CM FLUX: 073 / AP: 008
PREDICTIONS FOR 06 Aug 2020  10CM FLUX: 073 / AP: 011
PREDICTIONS FOR 07 Aug 2020  10CM FLUX: 072 / AP: 008
COMMENT: Solar flaring activity is low, with only one B-class flare
reported during last 24 hours. However, as the NOAA AR 2770 presently has
beta configuration of its photospheric magnetic field, it might be the
source of B-class and also isolated C-class flares in the coming hours.
During last 24 hours there were no Earth directed CMEs and the solar
protons remained at the background level.
Although Earth is still inside the fast solar wind, the wind speed has
strongly decreased during last 24 hours and its present value is 510 km/s.
The interplanetary magnetic field magnitude is about 3 nT.
The fast solar wind associated with the equatorial coronal hole of positive
polarity that has reached central meridian in the morning of August 03, can
be expected at Earth tomorrow. The geomagnetic conditions are presently
quiet, and we expect quiet to unsettled conditions in the coming hours.

TODAY'S ESTIMATED ISN  : 012, BASED ON 20 STATIONS.

SOLAR INDICES FOR 04 Aug 2020
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 073
AK CHAMBON LA FORET    : 011
AK WINGST              : 009
ESTIMATED AP           : 009
ESTIMATED ISN          : 011, BASED ON 30 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.