Daily Sunspot Evaluation
Observation Sheet Monday, 15 July 1974
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
- ED
- Reading
- all checks consistent
- File
- 19740715.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | -5 | 30E | 336 | |||
| 2 | J – 1 | -15 | 70E | 296 | |||
| 3 | B – 4 | -12 | 27E | 339 | |||
| 4 | H – 3 | -9 | 09W | 15 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.