Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9385 | S13 | E42 | 04 | 0030 | Beta | Mar 22, 2001 | Mar 29, 2001 | Apr 12, 2001 |
| № 9384 | N12 | W35 | 09 | 0100 | Beta | Mar 16, 2001 | Mar 23, 2001 | Apr 6, 2001 |
| № 9383 | S10 | W82 | 01 | 0050 | Alpha | Mar 13, 2001 | Mar 20, 2001 | Apr 2, 2001 |
| № 9376 | S13 | W04 | 04 | 0020 | Beta | Mar 19, 2001 | Mar 26, 2001 | Apr 8, 2001 |
| № 9373 | S07 | W34 | 22 | 0230 | Beta-Gamma | Mar 16, 2001 | Mar 23, 2001 | Apr 6, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to March 2001. The gray background is the average SSN index.
