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 May 25 1341 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 70525
SIDC SOLAR BULLETIN 25 May 2017, 1340UT
SIDC FORECAST (valid from 1230UT, 25 May 2017 until 27 May 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 25 May 2017  10CM FLUX: 074 / AP: 001
PREDICTIONS FOR 26 May 2017  10CM FLUX: 073 / AP: 008
PREDICTIONS FOR 27 May 2017  10CM FLUX: 074 / AP: 016
COMMENT: Over the past 24 hours solar activity has been low. No significant
flares have been recorded. NOAA Active Region (AR) 2660 has been most
active, producing two B-class flares. No Earth directed Coronal Mass
Ejections (CMEs) have been detected in coronagraph observations. The
greater than 10MeV proton flux remained at background levels over the past
24 hours. Solar activity is expected to remain low over the next 24 hours
with a small chance for C-class flares.
Solar wind speed decreased from about 475 km/s to values around 370 km/s.
The total interplanetary magnetic field (IMF) strength, as recorded by the
DSCOVR satellite, was around 3.5 nT. Bz fluctuated between -2 and +3 nT.
Geomagnetic conditions (K Dourbes between 0 and 3; NOAA Kp between 0 and 1)
were ranged from quiet to unsettled level in the past 24 hours. Solar wind
speed is expected to decrease even more today. In response geomagnetic
conditions are likely to experience mostly quiet to unsettled conditions
today (25-May-2017 April) and tomorrow (26-May-2017). Active conditions
with a small chance for minor geomagnetic storm are possible on the day
three (27-May-2017) due to possible arrival of 23-May 2017 coronal mass
ejection.
TODAY'S ESTIMATED ISN  : 027, BASED ON 24 STATIONS.

SOLAR INDICES FOR 24 May 2017
WOLF NUMBER CATANIA    : 035
10CM SOLAR FLUX        : 078
AK CHAMBON LA FORET    : 008
AK WINGST              : 004
ESTIMATED AP           : 004
ESTIMATED ISN          : 024, 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.