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: 2018 Jul 17 1240 UTC
:Product: documentation at http://www.sidc.be/products/uge
#--------------------------------------------------------------------#
# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
#--------------------------------------------------------------------#
SIDC URSIGRAM 80717
GEOALERT BRU198
UGEOA 30512 80717 1240/ 9930/ 
10172 20172 30172 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 17 Jul 2018 until 19 Jul
2018
COMMENT: Solar activity is low and there were no even B-class flares
reported during last 24 hours. We expect such a low flaring activity to
persist in the coming hours.
Coronagraph images do not show signatures of the Earth directed CMEs, and
the solar protons are at the background level.

The in situ observations indicate arrival of the possible ICME. The
increase of the interplanetary magnetic field magnitude (up to 15 nT),
observed at about 20 UT on July 16, was followed by rotation of the
magnetic field phi angle, increase of the solar wind speed and temperature,
and decrease of the density. Solar counterpart of this structure is
presently unclear, and one of the possibility is the large prominence
eruption from the south-west quadrant of the Sun, observed on July 13 at
about 22 UT.
The solar wind speed is presently about 420 km/s and the interplanetary
magnetic field magnitude is about 6 nT.
The increase of the solar wind speed, associated with patchy equatorial
coronal hole which reached central meridian on July 16, is expected at the
Earth late on July 19.
Due to longer interval of the negative value of the Bz component of the
interplanetary magnetic field (down to -5nT) local station at Dourbes
reported slightly disturbed geomagnetic conditions o (K=4) at about 21 UT
on July 16, and NOAA reported value of the Kp=3.
The geomagnetic conditions are presently quiet, and we expect quiet
geomagnetic conditions to persist in the coming hours.


TODAY'S ESTIMATED ISN  : 000, BASED ON 23 STATIONS.
UGEOI 30512 80717 1240/ 16/// 
10000 20720 3012/ 4//// 80000 90000 
99999
UGEOR 30512 80717 1240/ 17/06 17101 
10090 2//// 3//// 4201/ 50010 60002 44004 00000 
99999
USSPS 31405 17060 01232 90001 44004 01202
UMAGF 30503 80717 1004/ 16065 1/018 22113 33313
UMAGF 31523 80717 0000/ 16001 1/012 21232 31334
BT
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Details

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