Daily Sunspot Evaluation
Observation Sheet Monday, 7 April 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)
- 8
- Number of spots (f)
- 101
- Relative number (R)
- 181
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19800407.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 5 | 28 | 74W | 176 | 75W | 8 | |
| 2 | FKC – 40 | 12 | 01W | 103 | 02W | 13.5 | |
| 3 | AXX – 2 | 14 | 08E | 94 | 07E | ||
| 4 | FKC – 45 | 25 | 15E | 87 | 14E | 16.5 | |
| 5 | ? – 2 | -15 | 85W | 187 | 86W | 5 | |
| 6 | HSX – 1 | -9 | 36W | 138 | 37W | 1.5 | |
| 7 | HAX – 3 | -20 | 61E | 41 | 60E | 5 | |
| 8 | ? – 3 | -29 | 73E | 29 | 72E | 4 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.