spot group

spot group

[′spät ‚grüp]
(astrophysics)
A complex formation of the sun's surface consisting of a sunspot with several umbrae surrounded by a single penumbra, or of several sunspots which are close together and clearly associated.
References in periodicals archive ?
Once the final sweet spot group is established, I average the ten rounds producing that group to find the sweet spot length.
Worldwide GIZ has more than 16 000 people worldwide - more than 80% are based outside Germany, including the busy spot group of so-called national personnel.
Seeing an opening in the market that needed to be filled, Morrow launched Spot Group LLC which "fills a void in major cities nationwide where luxury residential buildings are prevalent.
A patch of plage was also seen to the NE of the spot group on Sept 21, 22 & 23.
Spain were sluggish in their 1-0 win over Croatia which secured top spot Group C with seven points from their three games, having opened with a draw against Italy.
FIGURE 5: CUMULATIVE NUMBERS SPOT GROUP DIFFERENCE Number of Lamps Replaced 9,897 11,728 1,831 Replacement Labor $98,970 $47,290 $51,680 Added Lamp Cost for Group Relamping 1,831 Lamps x $2 per Lamp ($3,662) Total Projected Savings $48,018
By July 12 the solar disk was dominated by this imposing spot group straddling the CM.
The show began on September 7th, when the spot group rotated into view around the Sun's eastern limb and promptly erupted with an X17 superflare.
Nicholls reported flares from this spot group on May 9, 11, 12 & 14.
A fuzzy filament was associated with AR1410 to the north of the spot group on Feb 1 and another filament, thick at its northern and southern ends was preceding ARs 1410 and 1413, aligned north-south.
When a spot group is near the Sun's limb, the magnetically active region around it often appears enlivened by bright faculae (hot, extraluminous patches).
From Dec 3 to 13, plage formed a broken ring at N17[degrees]/065[degrees] about 5[degrees] from the spot group.