Subsiding geomagnetic storm

subsiding-geomagnetic-storm-3

A coronal mass ejection (CME) hit Earth’s magnetic field on Sept 17th, sparking a moderate geomagnetic storm and auroras around the Arctic Circle. The view from Siberia was exquisite:

The storm is subsiding now. Nevertheless, high-latitude sky watchers should remain alert for auroras as Earth’s magnetic field continues to reverberate from the CME’s impact. (SpaceWeather)

Solar wind
speed: 415.5 km/sec
density: 4.1 protons/cm3

The Radio Sun
10.7 cm flux: 145 sfu

Planetary K-index
Now: Kp= 1 quiet
24-hr max: Kp= 2 quiet

Minor geomagnetic storming did take place due to a minor incoming CME shock and southward Bz. Things have returned to more quiet levels.

C-Class flare activity continues around Sunspots 1295 and 1296 which are now located towards the middle of the visible solar disk. Any Coronal Mass Ejections(CMEs)produced at this point would have a better chance of being earth directed.

A returning sunspot group (now numbered 1301) is rotating into view on the eastern limb.Elsewhere,a new sunspot numbered 1300 continues to expand in the northern hemisphere between region 1289 and 1295.Sunspot 1299 in the south remains quiet. (SolarHam)

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