Daily Sunspot Evaluation
Observation Sheet Tuesday, 16 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)
- 3
- Number of spots (f)
- 18
- Relative number (R)
- 48
- Observer
- FA
- Reading
- all checks consistent
- File
- 19740716.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -15 | 59°E | 296 | |||
| 2 | D – 15 | -13 | 14°E | 339 | |||
| 3 | H – 2 | -9 | 23°W | 16 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.