Daily Sunspot Evaluation
Observation Sheet Thursday, 24 July 1980
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 12
- Number of spots (f)
- 74
- Relative number (R)
- 194
- Observer
- AÖ0
- Reading
- all checks consistent
- File
- 19800724.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | AXX – 1 | 7 | 70W | 185 | 75W | - | |
| 2 | CAI – 4 | 19 | 56W | 171 | 59W | 4 | |
| 3 | BXO – 4 | 14 | 40W | 155 | 43W | 4.5 | |
| 4 | HAX – 1 | 15 | 23W | 138 | 26W | 1 | |
| 5 | DAO – 3 | 20 | 60E | 55 | 57E | 9 | |
| 6 | ? – 1 | -27 | 78W | 193 | 81W | - | |
| 7 | HKX – 12 | -27 | 54W | 169 | 57W | 6.5 | |
| 8 | DAO – 6 | -14 | 44W | 159 | 47W | 6.5 | |
| 9 | DAI – 11 | -21 | 41W | 156 | 44W | 7.5 | |
| 10 | HKX – 2 | -13 | 09W | 124 | 12W | 3 | |
| 11 | DKC – 24 | -19 | 01W | 116 | 04W | 7 | |
| 12 | CII – 5 | -7 | 73E | 42 | 70E | 6 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.