Sunspots and active regions
The following active regions with sunspot groups were visible on the Sun on September 17, 2023. 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) | |
|---|---|---|---|---|---|---|---|---|
| № 3435 | N10 | E69 | 02 | 0090 | Beta | Sep 23, 2023 | Sep 30, 2023 | Oct 14, 2023 |
| № 3434 | N08 | W14 | 02 | 0010 | Alpha | Sep 17, 2023 | Sep 24, 2023 | Oct 7, 2023 |
| № 3433 | N28 | E10 | 01 | 0080 | Alpha | Sep 19, 2023 | Sep 26, 2023 | Oct 10, 2023 |
| № 3430 | S17 | W74 | 01 | 0030 | Alpha | Sep 12, 2023 | Sep 19, 2023 | Oct 3, 2023 |
| № 3429 | N11 | W22 | 16 | 0090 | Beta-Gamma | Sep 16, 2023 | Sep 23, 2023 | Oct 7, 2023 |
| № 3425 | N24 | W65 | 06 | 0030 | Beta | Sep 13, 2023 | Sep 20, 2023 | Oct 4, 2023 |
Solar cycle progression
The average monthly sunspot number (SSN) from January 1994 to September 2023. The gray background is the average SSN index.
