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

Archive

Latest issue 

:Issued: 2012 May 23 1233 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 20523
SIDC SOLAR BULLETIN 23 May 2012, 1221UT
SIDC FORECAST (valid from 1230UT, 23 May 2012 until 25 May 2012)
SOLAR FLARES  : Eruptive (C-class flares expected, probability >= 50%)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 23 May 2012  10CM FLUX: 119 / AP: 018
PREDICTIONS FOR 24 May 2012  10CM FLUX: 117 / AP: 009
PREDICTIONS FOR 25 May 2012  10CM FLUX: 119 / AP: 006
COMMENT: Catania sunspot group 39 (NOAA AR 1484) produced a C1.2 flare
peaking at 00:27 UT today. More C-class flares can be expected from this
group, as well as from recently emerged Catania sunspot group 47 (NOAA
AR 1488). The post-shock solar wind flow was followed by a fast solar
wind stream (with the speed reaching 700 km/s) from a small low-latitude
coronal hole in the southern hemisphere. Due to high interplanetary
magnetic field (IMF) magnitude (that reached 15 nT), active geomagnetic
conditions (K = 4) were reported by Dourbes and IZMIRAN and minor storm
conditions (K = 5) were reported by NOAA. Currently the solar wind speed
is still elevated (around 620 km/s), but the IMF magnitude decreased to
average values (around 4 nT). We therefore expect quiet geomagnetic
conditions.

TODAY'S ESTIMATED ISN  : 055, BASED ON 13 STATIONS.

SOLAR INDICES FOR 22 May 2012
WOLF NUMBER CATANIA    : 114
10CM SOLAR FLUX        : 121
AK CHAMBON LA FORET    : 029
AK WINGST              : 025
ESTIMATED AP           : 024
ESTIMATED ISN          : 055, BASED ON 30 STATIONS.

NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX  END  LOC    XRAY OP  10CM RADIO BURST TYPES     Catania NOAA NOTE
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.