Daily Sunspot Evaluation
Observation Sheet Monday, 31 July 1978
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)
- 13
- Relative number (R)
- 43
- Observer
- HM
- Reading
- all checks consistent
- File
- 19780731.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 7 | 37 | 35E | 274 | 34E | ||
| 2 | J – 1 | 20 | 36E | 273 | 35E | ||
| 3 | J – 5 | -23 | 41E | 268 | 40E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.