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: 2017 Sep 20 1253 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 70920
SIDC SOLAR BULLETIN 20 Sep 2017, 1253UT
SIDC FORECAST (valid from 1230UT, 20 Sep 2017 until 22 Sep 2017)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 20 Sep 2017  10CM FLUX: 073 / AP: 007
PREDICTIONS FOR 21 Sep 2017  10CM FLUX: 076 / AP: 007
PREDICTIONS FOR 22 Sep 2017  10CM FLUX: 079 / AP: 007
COMMENT: Over the past 24 hours the solar activity was very low, only few
B-class flares have been recorded. Catania sunspot group 55 (NOAA active
region 2680) is unlikely to produce any flaring activity. The returning
region (Catania sunspot group 49 / NOAA active region 2676) is currently on
the East solar limb and is the source region of the B-class flares. We
expect the solar activity to increase with B-class flares and a small
probability of C-class flare coming from this returning region.

No Earth directed CMEs have been observed and the solar protons remained at
background level in the past 24 hours.

The Earth is currently inside a slow (around 500 km/s) solar wind flow. The
interplanetary magnetic field magnitude remained below 5 nT and the Bz
component fluctuating between -4 and 4 nT. The solar wind is expected
maintain its nominal conditions over the next days.

Geomagnetic conditions were quiet to unsettled (local K Dourbes 1-3, NOAA
Kp 2-3) and are expected to remain quiet over the next days.

TODAY'S ESTIMATED ISN  : 017, BASED ON 20 STATIONS.

SOLAR INDICES FOR 19 Sep 2017
WOLF NUMBER CATANIA    : 012
10CM SOLAR FLUX        : 071
AK CHAMBON LA FORET    : 017
AK WINGST              : 012
ESTIMATED AP           : 009
ESTIMATED ISN          : 012, BASED ON 32 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.