A fast-moving stream of solar wind is buffeting Earth’s magnetic field. The combined effect of this stream plus a CME expected to arrive soon has prompted NOAA forecasters to declare a 30% to 35% chance of geomagnetic storms on June 23-24. High-latitude sky watchers should be alert for auroras. (SpaceWeather)
speed: 597.7 km/sec
density: 3.1 protons/cm3
Now: Kp= 3 quiet
24-hr max: Kp= 4 unsettled
Interplanetary Mag. Field
Btotal: 6.4 nT
Bz: 4.2 nT south
An aurora watch is in effect over the next 48 hours because of the possibility of an incoming CME from Tuesdays long duration C7.7 Solar Flare around Sunspot 1236. A high speed solar wind streaming from a Coronal Hole is also expected to add to the chances of geomagnetic storming.
The geomagnetic field is expected to be mostly active with a chance for minor storm periods at mid-latitudes and major storm periods at high latitudes for the next two days (23-24 June). Effects from the high speed stream should prevail early on the 23rd. An additional contribution to activity is expected sometime between 1200-1800Z on the 23rd due to the arrival of the halo CME observed on 21 June. (SolarHam)
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