Daily Sunspot Evaluation
Observation Sheet Monday, 18 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)
- 24
- Relative number (R)
- 64
- Observer
- ED
- Reading
- all checks consistent
- File
- 19740218.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -18 | 06E | 139 | |||
| 2 | E – 19 | -18 | 06W | 151 | |||
| 3 | J – 3 | -16 | 60W | 205 | |||
| 4 | ? – 1 | -12 | 85W | 230 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.