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 tot

Latest issue

:Issued: 2019 Apr 20 1230 UTC
:Product: documentation at http://www.sidc.be/products/tot
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
#--------------------------------------------------------------------#
SIDC URSIGRAM 90420
SIDC SOLAR BULLETIN 20 Apr 2019, 1230UT
SIDC FORECAST (valid from 1230UT, 20 Apr 2019 until 22 Apr 2019)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 20 Apr 2019  10CM FLUX: 070 / AP: 005
PREDICTIONS FOR 21 Apr 2019  10CM FLUX: 070 / AP: 003
PREDICTIONS FOR 22 Apr 2019  10CM FLUX: 070 / AP: 003
COMMENT: Solar activity was at very low levels. While rounding the west
limb, NOAA 2738 produced 4 B-class flares, the strongest being a B8 flare
peaking at 00:50UT. The lone sunspot group currently visible on the solar
disk, NOAA 2739, was quiet and is decaying. No earth-directed coronal mass
ejections were observed over the last 24 hours. The greater than 10 MeV
proton flux was at nominal values. An equatorial negative polarity coronal
hole (CH) is transiting the central meridian.

Solar activity is expected to remain at very low levels.

Solar wind speed was fairly steady between 300 and 350 km/s (DSCOVR). Bz
varied between -4 and +6 nT. The interplanetary magnetic field was mostly
directed away from the Sun (positive sector) until about 07:00UT, when it
switched back to towards the Sun (negative sector). Geomagnetic conditions
were at quiet levels, with an isolated unsettled interval (14-17UT)
recorded at Dourbes.

Quiet geomagnetic conditions are expected to continue, with a chance on an
unsettled interval.

TODAY'S ESTIMATED ISN  : 012, BASED ON 26 STATIONS.
99999

SOLAR INDICES FOR 19 Apr 2019
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 073
AK CHAMBON LA FORET    : 009
AK WINGST              : ///
ESTIMATED AP           : 005
ESTIMATED ISN          : 024, BASED ON 28 STATIONS.

NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX  END  LOC    XRAY OP  10CM Catania/NOAA RADIO_BURST_TYPES 
NONE
END

UMAGF 30503 90420 1004/ 19060 1/009 21221 32111
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.
Besides the ISES codes like UMAGF, UCOSE and USSPS,
this message contains a forecast 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.