Daily Sunspot Evaluation
Observation Sheet Sunday, 30 June 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)
- 26
- Relative number (R)
- 56
- Observer
- ED
- Reading
- all checks consistent
- File
- 19740630.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 19 | -16 | 49E | 156 | |||
| 2 | J – 1 | -11 | 27E | 178 | |||
| 3 | B – 6 | -9 | 03E | 202 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.