No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on April 11, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8513 | S18 | E33 | 12 | 0090 | BETA | Apr 15, 1999 | Apr 22, 1999 | May 5, 1999 |
| № 8512 | S27 | E23 | 07 | 0060 | BETA | Apr 14, 1999 | Apr 21, 1999 | May 5, 1999 |
| № 8511 | S16 | E05 | 06 | 0110 | BETA | Apr 13, 1999 | Apr 19, 1999 | May 3, 1999 |
| № 8508 | N22 | W18 | 36 | 0190 | BETA-GAMMA | Apr 11, 1999 | Apr 18, 1999 | May 2, 1999 |
| № 8507 | N11 | W39 | 06 | 0020 | BETA | Apr 9, 1999 | Apr 16, 1999 | Apr 30, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to April 1999. The gray background is the average SSN index.
