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 Jul 26 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 70726
SIDC SOLAR BULLETIN 26 Jul 2017, 1230UT
SIDC FORECAST (valid from 1230UT, 26 Jul 2017 until 28 Jul 2017)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Active conditions expected (A>=20 or K=4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 26 Jul 2017  10CM FLUX: 070 / AP: 014
PREDICTIONS FOR 27 Jul 2017  10CM FLUX: 070 / AP: 014
PREDICTIONS FOR 28 Jul 2017  10CM FLUX: 070 / AP: 008
COMMENT: Solar activity was at very low levels during the period. Sunspot
region NOAA 2668 is decaying and barely visible. No earth-directed coronal
mass ejections (CMEs) were observed in available coronagraphic imagery. The
greater than 10 MeV proton flux reached a maximum of about 2 pfu (i.e.
below the 10 pfu event threshold) around 21-22UT, and is now gradually
declining.

Quiet flaring conditions are expected.

The earth environment remained under the influence of the high speed stream
(HSS) from a positive polarity coronal hole (CH). Wind speeds gradually
increased from an initial value near 570 km/s to about 660 km/s by 03UT,
then decreased to 590 km/s by the end of the period (DSCOVR). Bz oscillated
between -5 and +7 nT. The interplanetary magnetic field was mostly directed
away from the Sun, with a "towards" sector during the 14-22UT interval.

The geomagnetic field was at quiet to unsettled levels, with an active
episode during the 06-09UT interval recorded by both Dourbes and in Kp.
Mostly quiet to unsettled geomagnetic conditions are expected, with a
chance on another active episode under the persistent influence of the CH
HSS.

TODAY'S ESTIMATED ISN  : 000, BASED ON 14 STATIONS.

SOLAR INDICES FOR 25 Jul 2017
WOLF NUMBER CATANIA    : 000
10CM SOLAR FLUX        : 070
AK CHAMBON LA FORET    : 019
AK WINGST              : 013
ESTIMATED AP           : 013
ESTIMATED ISN          : 000, 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.