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Minor geomagnetic storm subsiding

minor-geomagnetic-storm-subsiding

The solar wind was at increased levels Tuesday morning and combined with a south tilting Bz, it stirred up a minor geomagnetic storm at high latitudes. Things have since returned to quieter levels.

Solar activity increased to moderate levels Monday with three M-Class flares taking place around a big new Sunspot numbered 1339. This region continues to rotate fully into view on the northeast limb. You can click HERE to watch a movie of the first M-Class flare which registered M1.1. This initial flare was followed a few hours later by a C8.2, M1.4 and M1.2. You can watch a movie below of those 3 events. So far on Tuesday only C-Class flares have been detected. (SolarHam)

The geomagnetic field ranged from quiet to minor storm levels with major and severe storm periods observed at high latitudes. At approximately 01/0817Z, a shock arrival was observed at the ACE spacecraft. Solar wind speed increased from approximately 370 km/s to 420 km/s while the total magnetic field (IMF Bt) increased from 5 to 15 nT. A sudden impulse (SI) of 18 nT was observed on the Boulder magnetometer at 01/0907Z. This event was possibly due to transient activity associated with a DSF on 28 October. (SWPC)

G1  Geomagnetic storm video (SolarWatcher)

Solar wind
speed: 399.8 km/sec
density: 5.8 protons/cm3

The Radio Sun
10.7 cm flux: 138 sfu

Planetary K-index
Now: Kp= 3 quiet
24-hr max: Kp= 5 storm    

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