Comment from the Belgium Royal Observatory.
We have had an active region (Beta AR2723) on the Western Limb of the sun for three days now,
Sept. 30 through Oct. 2, 2018. As of this hour, the EISN (estimated international sunspot number) is 16.
COMMENT: One active region visible on the solar disc, NOAA 2723 with beta
magnetic field configuration. No C-class flares in past 24 h. Solar
activity is expected to remain at low levels.
No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar
protons have remained at background levels over the past 24 hours.
The solar wind speed is at 480 km/s with interplanetary magnetic fields of
5 nT. Geomagnetic conditions reached active levels between 15:00 UT and
17:00 UT on October 1 at Dourbes (K=4), at planetary levels Kp reached 4
between 12:00 UT and 15:00 UT on October 1 and between 00:00 UT and 03:00
UT on October 2. This was due to solar wind of relatively high speed
(reaching 530 km/s) with interplanetary magnetic fields up to 10 nT with
oscillating periods including negative Bz. Quiet to unsettled conditions
for the coming hours are foreseen. The fast solar wind associated with a
small negative polarity equatorial coronal hole is expected to arrive on
October 4 (or late on October 3), causing up to active geomagnetic
TODAY'S ESTIMATED ISN : 014, BASED ON 14 STATIONS.