SIDC ursigram

:Issued: 2018 Jun 20 1230 UTC
:Product: documentation at http://www.sidc.be/products/uge
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# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
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SIDC URSIGRAM 80620
GEOALERT BRU171
UGEOA 30512 80620 1230/ 9930/ 
10202 20202 30202 
99999
PLAIN
NOTE: the above forecasts are valid from 1230UT, 20 Jun 2018 until 22 Jun
2018
COMMENT: The solar activity has been quiet over the past 24 hours with
X-ray flux remaining below C level. Catania sunspot group 86 and 87 (NOAA
active region 2713 and 2714) remained stable and produced only small
B-class flares. A new sunspot (Catania sunspot group 88, NOAA active region
2715) has recently emerged and produced only a small B-class flare. Flaring
conditions are expected to remain quiet for the next 24-hour period with a
small chance of C-class flare.

No Earth directed Coronal Mass Ejection has been observed. The greater than
10 MeV solar protons flux remained at nominal levels over the past 24 hours
and is expected to remain so.

The Earth remained under the influence of the solar wind associated with
the coronal hole, which passed the central meridian on Jun 15. The wind
speed values fluctuated between 480 to 520 km/s, and is currently
decreasing to reach 428 km/s. The interplanetary magnetic field is at its
nominal condition with the total magnetic field strength below 5 nT and the
southward component fluctuating between -3.5 and +4.5 nT. Solar wind
conditions are expected to return to the slow regime within the next two
days. A north pole coronal hole of positive polarity and extending to
latitude 25 deg. is currently passing through the central meridian. The
associated fast solar wind would reach Earth on the 23rd of June.

Geomagnetic conditions have been mostly quiet over the past 24 hours. The
Kp index (NOAA) ranged between 1-2 and local K index 0-3 (Dourbes). The
geomagnetic conditions are expected to remained quiet for the next period.



TODAY'S ESTIMATED ISN  : 055, BASED ON 15 STATIONS.
UGEOI 30512 80620 1230/ 19/// 
10042 20770 3//// 4//// 80102 90070 
99999
UGEOR 30512 80620 1230/ 20/07 20103 
10086 2//// 3//// 4201/ 50040 60015 42705 00000 
10087 2//// 3//// 4321/ 50040 60005 45708 01000 
10088 2//// 3//// 4422/ 50130 60016 12808 01000 
99999
USSPS 31405 20070 06642 86004 42705 01215 87004 45708 22305 88013 12808
24416
UMAGF 30503 80620 1004/ 19068 1/008 22211 31111
BT
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