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Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on June 13, 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) | |
|---|---|---|---|---|---|---|---|---|
| № 8585 | N38 | E79 | 03 | 0090 | BETA | Jun 20, 1999 | Jun 28, 1999 | Jul 12, 1999 |
| № 8584 | N25 | W20 | 05 | 0010 | BETA | Jun 12, 1999 | Jun 19, 1999 | Jul 3, 1999 |
| № 8583 | S13 | E58 | 08 | 0150 | BETA | Jun 18, 1999 | Jun 25, 1999 | Jul 9, 1999 |
| № 8582 | N26 | E20 | 10 | 0020 | BETA | Jun 15, 1999 | Jun 22, 1999 | Jul 6, 1999 |
| № 8580 | S20 | E30 | 02 | 0250 | ALPHA | Jun 16, 1999 | Jun 23, 1999 | Jul 7, 1999 |
| № 8578 | N20 | W47 | 08 | 0110 | BETA | Jun 10, 1999 | Jun 17, 1999 | Jul 1, 1999 |
| № 8576 | S28 | W27 | 14 | 0060 | BETA | Jun 12, 1999 | Jun 19, 1999 | Jul 3, 1999 |
| № 8575 | N14 | W43 | 06 | 0010 | BETA | Jun 11, 1999 | Jun 17, 1999 | Jul 1, 1999 |
| № 8574 | N30 | W48 | 11 | 0170 | BETA | Jun 10, 1999 | Jun 17, 1999 | Jul 1, 1999 |
| № 8571 | S19 | W29 | 04 | 0030 | BETA | Jun 12, 1999 | Jun 19, 1999 | Jul 2, 1999 |
| № 8570 | S15 | W32 | 02 | 0030 | ALPHA | Jun 11, 1999 | Jun 18, 1999 | Jul 2, 1999 |
| № 8569 | N20 | W30 | 40 | 0310 | BETA-GAMMA | Jun 12, 1999 | Jun 18, 1999 | Jul 2, 1999 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1970 to June 1999. The gray background is the average SSN index.
