2017 May 18 2100 UTC Sunspot Group Classification Results Number of Detected Sunspot Groups : 2 Date G_Ind Lat Lon Num_Spot Num_Spot_Pen Lon_Ext N-S Ratio_Area Ratio_Um Ratio_Pol Assym Num_Neutral Rough Zpc Wilson 201705182100 1 - 8.4 39.2 3 1 1.5 0.49 0.57 0.00 2.00 273.41 1 1.31 Cai Beta 201705182100 2 10.6 40.7 1 1 0.7 0.77 -99.00 0.26 0.04 45.34 0 -99.00 Hsx Alpha