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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 1, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8477 | S25 | E79 | 04 | 0030 | BETA | Mar 8, 1999 | Mar 15, 1999 | Mar 29, 1999 |
| № 8476 | N20 | E21 | 09 | 0010 | BETA | Mar 3, 1999 | Mar 10, 1999 | Mar 24, 1999 |
| № 8475 | N32 | E31 | 10 | 0030 | BETA | Mar 4, 1999 | Mar 11, 1999 | Mar 26, 1999 |
| № 8474 | S24 | W50 | 02 | 0010 | BETA | Feb 26, 1999 | Mar 5, 1999 | Mar 19, 1999 |
| № 8473 | N16 | W19 | 02 | 0000 | BETA | Feb 28, 1999 | Mar 7, 1999 | Mar 21, 1999 |
| № 8472 | N30 | E13 | 11 | 0030 | BETA | Mar 3, 1999 | Mar 10, 1999 | Mar 24, 1999 |
| № 8471 | N29 | W10 | 26 | 0120 | BETA-GAMMA | Mar 1, 1999 | Mar 8, 1999 | Mar 22, 1999 |
| № 8470 | S23 | W08 | 01 | 0010 | ALPHA | Mar 1, 1999 | Mar 8, 1999 | Mar 22, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to March 1999. The gray background is the average SSN index.
