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

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Latest issue

:Issued: 2019 Aug 20 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 90820
SIDC SOLAR BULLETIN 20 Aug 2019, 1230UT
SIDC FORECAST (valid from 1230UT, 20 Aug 2019 until 22 Aug 2019)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 20 Aug 2019  10CM FLUX: 068 / AP: 009
PREDICTIONS FOR 21 Aug 2019  10CM FLUX: 067 / AP: 011
PREDICTIONS FOR 22 Aug 2019  10CM FLUX: 067 / AP: 010
COMMENT: The solar activity has been quiet over the past 24 hours. The sun
is currently spotless and the X-ray flux remained below B-level. Solar
activity is expected to remain at low levels for the next 24 hours.

No Earth-directed coronal mass ejections (CME) were observed over the last
24 hours in the available coronagraph imagery. The greater than 10 MeV
proton flux remained at background levels over the past 24 hours and is
expected to remain at low levels.

The solar wind parameters show some enhancements starting from August 20,
around 01:00 UT: The wind speed increased from 315 km/s to 425 km/s, the
total interplanetary magnetic field reached 10 nT, and the Bz component
varied between -7 nT and +7 nT (as recorded by ACE). The solar wind
parameters may remain slightly enhanced for the next period due to the
effect of a southern coronal hole of negative polarity that was facing
Earth on August 18 in about two days.

Mostly quiet geomagnetic conditions were observed, Dourbes observed
unsettled conditions (K=3) that can be associated with the effect of the
southern coronal hole. Quiet to unsettled conditions are expected for the
next period, with small chances of short periods of active conditions.
TODAY'S ESTIMATED ISN  : 000, BASED ON 20 STATIONS.

SOLAR INDICES FOR 19 Aug 2019
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 068
AK CHAMBON LA FORET    : 007
AK WINGST              : 004
ESTIMATED AP           : 004
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.