Tuesday, May 24, 2016

The SUN Today

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

Sunspot AR2546 is big but quiet. Solar activity remains very low. Credit: SDO/HMI

Sunspot number: 13
What is the sunspot number?
Updated 24 May 2016


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