Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on May 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 617 | S12 | E07 | 09 | 0030 | Beta | May 20, 2004 | May 27, 2004 | Jun 9, 2004 |
| № 616 | N07 | E52 | 01 | 0010 | Alpha | May 23, 2004 | May 30, 2004 | Jun 13, 2004 |
| № 615 | N16 | E47 | 06 | 0130 | Alpha | May 23, 2004 | May 30, 2004 | Jun 12, 2004 |
| № 614 | S08 | W93 | 03 | 0030 | Beta | May 12, 2004 | May 19, 2004 | Jun 2, 2004 |
| № 613 | S09 | E21 | 02 | 0110 | Alpha | May 21, 2004 | May 28, 2004 | Jun 10, 2004 |
| № 612 | N10 | W50 | 14 | 0160 | Beta | May 16, 2004 | May 22, 2004 | Jun 5, 2004 |
| № 609 | S03 | W35 | 26 | 0320 | Beta-Gamma | May 17, 2004 | May 23, 2004 | Jun 6, 2004 |
| № 606 | S08 | W57 | 06 | 0060 | Beta | 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.
