Daily Sunspot Evaluation
Observation Sheet Monday, 18 March 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)
- 6
- Relative number (R)
- 36
- Observer
- FA
- Reading
- all checks consistent
- File
- 19740318.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | -9 | 85E | 52 | |||
| 2 | A – 1 | -17 | 17E | 120 | |||
| 3 | B – 4 | -20 | 12W | 149 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.