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: 2020 Apr 01 1231 UTC
:Product: documentation at http://www.sidc.be/products/meu
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
# (RWC Belgium)                                                      #
#--------------------------------------------------------------------#
SIDC URSIGRAM 00401
SIDC SOLAR BULLETIN 01 Apr 2020, 1230UT
SIDC FORECAST (valid from 1230UT, 01 Apr 2020 until 03 Apr 2020)
SOLAR FLARES  : Quiet conditions (<50% probability of C-class flares)
GEOMAGNETISM  : Quiet (A<20 and K<4)
SOLAR PROTONS : Quiet
PREDICTIONS FOR 01 Apr 2020  10CM FLUX: 070 / AP: 003
PREDICTIONS FOR 02 Apr 2020  10CM FLUX: 071 / AP: 006
PREDICTIONS FOR 03 Apr 2020  10CM FLUX: 071 / AP: 004
COMMENT: Solar flaring activity was at very low levels. No significant
flares have been recorded. A small coronal hole began to transit the
central meridian on Mar 31 20:00 UT. Solar activity is expected to remain
at very low levels.

No Earth directed Coronal Mass Ejections (CMEs) were observed in the
available coronagraphic imagery.

The greater than 10 MeV proton flux was at nominal levels over the past 24
hours and is expected to stay at nominal levels for the next 24 hours. The
greater than 2 MeV electron flux was at moderate levels over the past 24
hours and is expected to increase further in the coming days.

The solar wind speed near Earth gradually decreased over the past 24 hours,
with values ranging from 450 to 535 km/s (DSCOVR). The Interplanetary
Magnetic Field (IMF) was predominantly oriented towards the Sun (phi angle
in the negative sector). The magnitude of the magnetic field varied between
0 and +7 nT. Bz ranged between -5 and +4 nT.

Quiet to unsettled geomagnetic conditions were registered for the past 24
hours (K Dourbes recorded values 0-3 and NOAA Kp 2-3). Quiet to unsettled
(K Dourbes = 3) geomagnetic conditions are expected for the next 24 hours,
due to remaining effects of the coronal hole that crossed the central
meridian on Mar 26.

TODAY'S ESTIMATED ISN  : 014, BASED ON 17 STATIONS.

SOLAR INDICES FOR 31 Mar 2020
WOLF NUMBER CATANIA    : ///
10CM SOLAR FLUX        : 070
AK CHAMBON LA FORET    : 019
AK WINGST              : 018
ESTIMATED AP           : 017
ESTIMATED ISN          : ///, BASED ON /// 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.