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 uge

Latest issue

:Issued: 2021 Sep 23 1250 UTC
:Product: documentation at http://www.sidc.be/products/uge
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
#--------------------------------------------------------------------#
SIDC URSIGRAM 10923
GEOALERT BRU266
UGEOA 30512 10923 1250/ 9930/ 
11232 21232 30232 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 23 Sep 2021 until 25 Sep
2021
COMMENT: Over the past 24 hours, the regions reported yesterday have been
present on the solar disk. One more unnamed region has appeared to the
vicinity of the SE. A M2.9 flare originated from region Catania 45/NOAA
2871 (magnetic type beta-delta) has been recorded. Over the next 24 hours,
C-class flares can be expected.

No Earth directed Coronal Mass Ejections (CMEs) have been conformed in the
available coronagraphic imagery.

The greater than 10 MeV proton flux was at background levels in the past 24
hours, and is expected to stay at nominal levels in the next 24 hours. The
greater than 2 MeV electron flux remained below the 1000 pfu alert
threshold. Over the next 24 hours, it is expected to increase towards the
threshold. The 24h electron fluence was at nominal levels over the past 24
hours. Over the next 24 hours they are expected to remain at those levels,
increasing towards moderate levels.

Over the past 24 hours the solar wind speed varied from 360 to 405 km/s.
The total magnetic field strength had values between 2 and 6 nT, while its
Bz component varied between -5 and 6 nT. The interplanetary magnetic field
phi angle has been mainly on the positive sector (directed away from the
Sun) with small variations. Solar wind parameters are expected to be
further enhanced over the next 24 hours, in the small chance of the arrival
of the CME from Sep 19 and effects of the high speed stream associated with
the negative Coronal Hole present on Central Meridian. An extension of the
northern positive coronal hole will cross central meridian tomorrow.

Geomagnetic conditions were at quiet to unsettled levels, with an active
periods on Sep 23 06:00-09:00UT (NOAA Kp 1-4 and K Dourbes 1-3) over the
past 24 hours. Unsettled conditions with possibility of active events can
be expected over the next 24 hours.



TODAY'S ESTIMATED ISN  : 076, BASED ON 12 STATIONS.
UGEOI 30512 10923 1250/ 22/// 
1//// 20890 3014/ 4//// 8//// 9//// 
99999
UGEOR 30512 10923 1250/ 21/07 23105 
10045 2//// 3//// 4422/ 50070 60007 24728 16100 
10044 2//// 3//// 4311/ 50030 60003 13717 03000 
10043 2//// 3//// 4421/ 50060 60007 41126 03000 
10047 2//// 3//// 4201/ 50020 60007 30424 00000 
10046 2//// 3//// 4201/ 50010 60002 32926 00000 
99999
UMAGF 30503 10923 1004/ 22063 1/016 23221 32322
UMAGF 31523 10923 0000/ 22006 1/014 24333 32133
BT
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