No image for the selected date
Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on February 18, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8467 | N16 | E53 | 01 | 0080 | ALPHA | Feb 23, 1999 | Mar 2, 1999 | Mar 16, 1999 |
| № 8466 | S24 | E41 | 01 | 0000 | ALPHA | Feb 22, 1999 | Mar 1, 1999 | Mar 15, 1999 |
| № 8464 | N20 | W01 | 07 | 0070 | BETA | Feb 19, 1999 | Feb 26, 1999 | Mar 12, 1999 |
| № 8463 | S17 | W10 | 01 | 0070 | ALPHA | Feb 18, 1999 | Feb 25, 1999 | Mar 11, 1999 |
| № 8462 | N20 | W30 | 09 | 0170 | BETA | Feb 17, 1999 | Feb 24, 1999 | Mar 10, 1999 |
| № 8460 | S17 | W25 | 03 | 0020 | BETA | Feb 17, 1999 | Feb 24, 1999 | Mar 10, 1999 |
| № 8459 | S30 | W72 | 06 | 0140 | BETA | Feb 14, 1999 | Feb 21, 1999 | Mar 7, 1999 |
| № 8458 | S23 | W39 | 08 | 0580 | BETA | Feb 16, 1999 | Feb 23, 1999 | Mar 9, 1999 |
| № 8457 | N15 | W45 | 09 | 0330 | BETA | Feb 16, 1999 | Feb 23, 1999 | Mar 8, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to February 1999. The gray background is the average SSN index.
