Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 9380 | S09 | E68 | 01 | 0010 | Alpha | Mar 19, 2001 | Mar 26, 2001 | Apr 8, 2001 |
| № 9379 | N31 | E41 | 01 | 0020 | Alpha | Mar 17, 2001 | Mar 24, 2001 | Apr 7, 2001 |
| № 9378 | N24 | W30 | 04 | 0020 | Beta | Mar 12, 2001 | Mar 18, 2001 | Apr 1, 2001 |
| № 9377 | S18 | W11 | 01 | 0000 | Alpha | Mar 13, 2001 | Mar 20, 2001 | Apr 3, 2001 |
| № 9376 | S15 | E59 | 04 | 0040 | Beta | Mar 18, 2001 | Mar 25, 2001 | Apr 8, 2001 |
| № 9375 | S16 | W69 | 01 | 0020 | Alpha | Mar 9, 2001 | Mar 15, 2001 | Mar 29, 2001 |
| № 9374 | S18 | E30 | 01 | 0000 | Alpha | Mar 16, 2001 | Mar 23, 2001 | Apr 6, 2001 |
| № 9373 | S08 | E36 | 32 | 0320 | Beta | Mar 17, 2001 | Mar 23, 2001 | Apr 6, 2001 |
| № 9372 | S35 | W86 | 04 | 0040 | Beta | Mar 7, 2001 | Mar 14, 2001 | Mar 29, 2001 |
| № 9370 | N10 | W63 | 13 | 0130 | Beta | Mar 9, 2001 | Mar 16, 2001 | Mar 29, 2001 |
| № 9368 | N24 | W82 | 02 | 0080 | Beta | Mar 8, 2001 | Mar 14, 2001 | Mar 28, 2001 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1972 to March 2001. The gray background is the average SSN index.
