No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on March 17, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8489 | N13 | W29 | 03 | 0050 | BETA | Mar 16, 1999 | Mar 23, 1999 | Apr 5, 1999 |
| № 8488 | S26 | E07 | 03 | 0020 | BETA | Mar 19, 1999 | Mar 26, 1999 | Apr 9, 1999 |
| № 8487 | N17 | W03 | 22 | 0180 | BETA | Mar 18, 1999 | Mar 25, 1999 | Apr 7, 1999 |
| № 8485 | N23 | W40 | 50 | 0610 | GAMMA | Mar 15, 1999 | Mar 22, 1999 | Apr 5, 1999 |
| № 8484 | S23 | W23 | 06 | 0040 | BETA | Mar 16, 1999 | Mar 23, 1999 | Apr 6, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to March 1999. The gray background is the average SSN index.
