Daily Sunspot Evaluation
Observation Sheet Friday, 15 June 1973
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)
- 34
- Relative number (R)
- 74
- Observer
- HM
- Reading
- all checks consistent
- File
- 19730615.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 25 | 13 | 32E | 149 | 411 | ||
| 2 | A – 2 | -15 | 29W | 210 | 108 | ||
| 3 | ? – 2 | 14 | 80W | 261 | 104 | ||
| 4 | J – 5 | 16 | 29W | 210 | 106 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.