Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 13, 2004. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 611 | S12 | W18 | 02 | 0020 | Beta | May 13, 2004 | May 20, 2004 | Jun 2, 2004 |
| № 610 | S02 | E15 | 06 | 0020 | Beta | May 15, 2004 | May 22, 2004 | Jun 5, 2004 |
| № 609 | S04 | E37 | 15 | 0040 | Beta | May 17, 2004 | May 24, 2004 | Jun 6, 2004 |
| № 608 | S04 | E23 | 04 | 0030 | Beta | May 16, 2004 | May 23, 2004 | Jun 5, 2004 |
| № 606 | S10 | E09 | 06 | 0190 | Alpha | May 15, 2004 | May 22, 2004 | Jun 4, 2004 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1975 to May 2004. The gray background is the average SSN index.
