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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on July 30, 1998. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8287 | N17 | W53 | 01 | 0010 | ALPHA | Jul 27, 1998 | Aug 3, 1998 | Aug 16, 1998 |
| № 8284 | N27 | W51 | 10 | 0070 | BETA | Jul 27, 1998 | Aug 3, 1998 | Aug 17, 1998 |
| № 8283 | N28 | E45 | 02 | 0050 | ALPHA | Aug 3, 1998 | Aug 10, 1998 | Aug 24, 1998 |
| № 8282 | N32 | W25 | 18 | 0320 | BETA | Jul 29, 1998 | Aug 5, 1998 | Aug 19, 1998 |
| № 8281 | N17 | W31 | 04 | 0010 | BETA | Jul 28, 1998 | Aug 4, 1998 | Aug 18, 1998 |
| № 8280 | S23 | W22 | 08 | 0340 | BETA | Jul 29, 1998 | Aug 5, 1998 | Aug 19, 1998 |
| № 8279 | N23 | W79 | 02 | 0010 | BETA | Jul 25, 1998 | Aug 1, 1998 | Aug 15, 1998 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1969 to July 1998. The gray background is the average SSN index.
