Daily Sunspot Evaluation
Observation Sheet Sunday, 8 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)
- 3
- Number of spots (f)
- 3
- Relative number (R)
- 33
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740908.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -4 | 13E | 346 | |||
| 2 | A – 1 | -15 | 20E | 338 | |||
| 3 | J – 1 | -7 | 22W | 21 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.