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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 9, 1999. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8486 | S25 | W11 | 05 | 0010 | BETA | Mar 9, 1999 | Mar 16, 1999 | Mar 30, 1999 |
| № 8485 | N22 | E67 | 04 | 0030 | BETA | Mar 15, 1999 | Mar 22, 1999 | Apr 5, 1999 |
| № 8484 | S22 | E77 | 01 | 0100 | ALPHA | Mar 16, 1999 | Mar 23, 1999 | Apr 6, 1999 |
| № 8483 | S18 | W32 | 07 | 0110 | BETA | Mar 7, 1999 | Mar 14, 1999 | Mar 28, 1999 |
| № 8482 | S31 | E50 | 02 | 0010 | BETA | Mar 14, 1999 | Mar 21, 1999 | Apr 4, 1999 |
| № 8477 | S27 | W17 | 14 | 0120 | BETA-GAMMA | Mar 9, 1999 | Mar 16, 1999 | Mar 30, 1999 |
| № 8476 | N18 | W90 | 04 | 0150 | BETA | Mar 3, 1999 | Mar 10, 1999 | Mar 24, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to March 1999. The gray background is the average SSN index.
