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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 28, 2001. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9363 | S20 | W15 | 04 | 0010 | Beta | Feb 28, 2001 | Mar 7, 2001 | Mar 21, 2001 |
| № 9360 | S10 | W23 | 03 | 0010 | Beta | Feb 27, 2001 | Mar 6, 2001 | Mar 20, 2001 |
| № 9359 | N13 | W18 | 40 | 0160 | Beta | Feb 28, 2001 | Mar 6, 2001 | Mar 20, 2001 |
| № 9358 | S10 | W75 | 03 | 0020 | Beta | Feb 23, 2001 | Mar 2, 2001 | Mar 16, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to February 2001. The gray background is the average SSN index.
