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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on December 18, 2003. Coordinates are given as of the end of the day.
| Group ID | Location | Number of sunspots | Area (msh) | Type | CM Passage | Disappearance (W90) | Reappearance (W270) | |
|---|---|---|---|---|---|---|---|---|
| № 527 | S15 | W41 | 04 | 0030 | Beta | Dec 16, 2003 | Dec 23, 2003 | Jan 5, 2004 |
| № 526 | N12 | W54 | 01 | 0030 | Alpha | Dec 15, 2003 | Dec 22, 2003 | Jan 4, 2004 |
| № 525 | N09 | E56 | 05 | 0070 | Beta | Dec 23, 2003 | Dec 30, 2003 | Jan 13, 2004 |
| № 524 | S08 | E54 | 01 | 0050 | Alpha | Dec 23, 2003 | Dec 30, 2003 | Jan 12, 2004 |
| № 523 | S15 | E58 | 02 | 0020 | Alpha | Dec 23, 2003 | Dec 30, 2003 | Jan 13, 2004 |
| № 521 | S11 | W20 | 05 | 0020 | Beta | Dec 17, 2003 | Dec 24, 2003 | Jan 7, 2004 |
| № 520 | N03 | W22 | 04 | 0110 | Beta | Dec 17, 2003 | Dec 24, 2003 | Jan 7, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1974 to December 2003. The gray background is the average SSN index.
