Daily Sunspot Evaluation
Observation Sheet Saturday, 16 February 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)
- 15
- Relative number (R)
- 55
- Observer
- ED
- Reading
- all checks consistent
- File
- 19740216.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -18 | 34E | 138 | |||
| 2 | D – 7 | -19 | 22E | 150 | |||
| 3 | G – 2 | -17 | 29W | 201 | |||
| 4 | C – 5 | -12 | 61W | 233 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.