Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 July 1975
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)
- 28
- Relative number (R)
- 58
- Observer
- GA
- Reading
- all checks consistent
- File
- 19750715.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 10 | -8 | 64E | 165 | 60E | ||
| 2 | J – 2 | -11 | 13E | 216 | 10E | ||
| 3 | E – 16 | 6 | 72W | 301 | 75W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.