Daily Sunspot Evaluation
Observation Sheet Friday, 14 April 1972
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)
- 23
- Relative number (R)
- 63
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720414.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 8 | 30E | 28 | |||
| 2 | C – 6 | -12 | 05E | 53 | |||
| 3 | J – 2 | -16 | 36W | 94 | |||
| 4 | D – 14 | -8 | 26W | 84 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.