Daily Sunspot Evaluation
Observation Sheet Monday, 9 September 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)
- 6
- Number of spots (f)
- 12
- Relative number (R)
- 72
- Observer
- ED
- Reading
- all checks consistent
- File
- 19740909.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 3 | 8 | 82E | 264 | |||
| 2 | ? – 1 | -12 | 81E | 265 | |||
| 3 | A – 1 | -15 | 07E | 339 | |||
| 4 | J – 3 | -4 | 01W | 347 | |||
| 5 | J – 1 | -7 | 35W | 21 | |||
| 6 | A – 3 | 8 | 30W | 16 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.