Daily Sunspot Evaluation
Observation Sheet Tuesday, 19 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)
- 3
- Number of spots (f)
- 25
- Relative number (R)
- 55
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740219.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | -18 | 07W | 139 | |||
| 2 | E – 17 | -18 | 19W | 151 | |||
| 3 | J – 5 | -16 | 72W | 204 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.