Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 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) | |
|---|---|---|---|---|---|---|---|---|
| № 314 | S16 | W39 | 27 | 0450 | Beta-Gamma-Delta | Mar 16, 2003 | Mar 23, 2003 | Apr 6, 2003 |
| № 313 | N30 | W53 | 03 | 0010 | Alpha | Mar 15, 2003 | Mar 22, 2003 | Apr 5, 2003 |
| № 311 | S10 | W64 | 02 | 0020 | Alpha | Mar 14, 2003 | Mar 21, 2003 | Apr 4, 2003 |
| № 306 | N06 | W60 | 08 | 0600 | Beta-Gamma | Mar 14, 2003 | Mar 21, 2003 | Apr 4, 2003 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1974 to March 2003. The gray background is the average SSN index.
