Daily Sunspot Evaluation
Observation Sheet Thursday, 7 July 1977
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)
- 4
- Number of spots (f)
- 10
- Relative number (R)
- 50
- Observer
- FA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19770707.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 18 | 15E | 31 | 12E | ||
| 2 | J – 1 | -19 | 47E | 353 ⚠ | 44E | ||
| 3 | D – 7 | 20 | 48W | 94 | 51W | ||
| 4 | ? – 1 | 37 | 85W | 131 | 88W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.