Daily Sunspot Evaluation
Observation Sheet Sunday, 13 October 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)
- 2
- Number of spots (f)
- 97
- Relative number (R)
- 117
- Observer
- SK
- Reading
- all checks consistent
- File
- 19741013.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 4 | -17 | 62W | 318 | 65W | ||
| 2 | F – 93 | 9 | 18W | 276 | 22W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.