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Table 1.
Overview of the sunspot observations used in this study.
| NOAA | Date | θ | Umbral area | Evolutionary state |
|---|---|---|---|---|
| [deg] | [Mm2] | |||
| 10921 | 2006.11.05 | 22 | 54 | Stable |
| 10923 | 2006.11.12 | 31 | 541 | Stable |
| 2006.11.13 | 15 | 550 | Stable | |
| 2006.11.14 | 8 | 571 | Stable | |
| 2006.11.15 | 13 | 587 | Stable | |
| 2006.11.16 | 30 | 558 | Stable | |
| 10926 | 2006.12.03 | 24 | 33 | Forming |
| 10930 | 2006.12.13 | 29 | 366 | Stable |
| 2006.12.14 | 41 | 350 | Stable | |
| 10933 | 2007.01.04 | 16 | 155 | Stable |
| 2007.01.06 | 9 | 159 | Stable | |
| 2007.01.07 | 24 | 149 | Stable | |
| 10944 | 2007.02.28 | 2 | 62 | Stable |
| 2007.03.01 | 11 | 64 | Stable | |
| 2007.03.02 | 16 | 64 | Stable | |
| 2007.03.03 | 44 | 55 | Stable | |
| 10953 | 2007.04.30 | 13 | 290 | Stable |
| 2007.05.01 | 7 | 284 | Stable | |
| 2007.05.02 | 12 | 232 | Stable | |
| 2007.05.03 | 24 | 212 | Stable | |
| 2007.05.04 | 37 | 195 | Stable | |
| 10960 | 2007.06.10 | 34 | 44 | Stable |
| 2007.06.11 | 54 | 36 | Stable | |
| 2007.06.12 | 57 | 34 | Stable | |
| 10969 | 2007.08.27 | 12 | 66 | Decaying |
| 2007.08.28 | 16 | 57 | Decaying | |
| 11039a | 2009.12.27 | 44 | 46 | Forming |
| 2009.12.28 | 34 | 39 | Forming | |
| 2010.01.01 | 29 | 55 | Forming | |
| 11039b | 2010.01.01 | 29 | 49 | Forming |
| 11041 | 2010.01.26 | 20 | 35 | Decaying |
| 11106 | 2010.09.16 | 27 | 34 | Decaying |
| 11113 | 2010.10.20 | 14 | 70 | Stable |
| 2010.10.22 | 35 | 47 | Stable | |
| 11117a | 2010.10.25 | 18 | 44 | Stable |
| 2010.10.27 | 25 | 33 | Stable | |
| 2010.10.28 | 35 | 33 | Stable | |
| 11117b | 2010.10.27 | 25 | 99 | Forming |
| 2010.10.28 | 35 | 88 | Forming | |
| 11131 | 2010.12.10 | 41 | 268 | Stable |
| 11195 | 2011.04.26 | 26 | 103 | Stable |
| 11279 | 2011.08.31 | 6 | 46 | Decaying |
| 11360 | 2011.11.28 | 21 | 41 | Decaying |
| 11361 | 2011.12.03 | 34 | 41 | Stable |
| 11363 | 2011.12.06 | 25 | 190 | Stable |
| 11419 | 2012.02.18 | 37 | 23 | Decaying |
| 11536 | 2012.07.31 | 34 | 28 | Forming |
| 11560 | 2012.09.02 | 9 | 69 | Forming/decaying |
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