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 Apr 25 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 90425
SIDC SOLAR BULLETIN 25 Apr 2019, 1230UT
SIDC FORECAST (valid from 1230UT, 25 Apr 2019 until 27 Apr 2019)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 25 Apr 2019  10CM FLUX: 069 / AP: 006
PREDICTIONS FOR 26 Apr 2019  10CM FLUX: 069 / AP: 007
PREDICTIONS FOR 27 Apr 2019  10CM FLUX: 069 / AP: 011
COMMENT: No flares in the past 24 h. No active regions visible on the solar
disk. Solar activity is expected to be low.

No Earth directed CMEs in past 24 h. Solar protons have remained at
background levels over the past 24 hours.

The solar wind speed is at 420 km/s with interplanetary magnetic field
magnitude of 5 nT. Geomagnetic conditions have been quiet. The solar wind
emanating from a small negative polarity equatorial coronal hole may affect
the Earth in 48 h (up to k = 4), quiet conditions expected until then.

TODAY'S ESTIMATED ISN  : 000, BASED ON 21 STATIONS.

SOLAR INDICES FOR 24 Apr 2019
WOLF NUMBER CATANIA    : 000
10CM SOLAR FLUX        : 069
AK CHAMBON LA FORET    : 011
AK WINGST              : ///
ESTIMATED AP           : 011
ESTIMATED ISN          : 000, BASED ON 22 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.