SOLAR SECTOR BOUNDARY CROSSING: Late on May 25th, Earth will cross a fold in the heliospheric current sheet and enter a region of space filled with negative polarity magnetic fields. Such fields can open a crack in Earth's magnetosphere, allowing solar wind to pour in and fuel geomagnetic disturbances. According to NOAA forecasters, the odds of a G1-class storm is 20% to 30%.
Daily Sun: 24 May 16
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What is the sunspot number?
Updated 24 May 2016
Source:http://www.spaceweather.com/
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