Daily Sunspot Evaluation
Observation Sheet Thursday, 15 August 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)
- 7
- Number of spots (f)
- 16
- Relative number (R)
- 86
- Observer
- ED
- Reading
- all checks consistent
- File
- 19740815.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 8 | 04E | 312 | |||
| 2 | J – 1 | -15 | 59E | 257 | |||
| 3 | C – 9 | -5 | 24W | 340 | |||
| 4 | A – 1 | -10 | 40W | 356 | |||
| 5 | J – 1 | -7 | 53W | 9 | |||
| 6 | J – 1 | -8 | 64W | 20 | |||
| 7 | A – 1 | 8 | 10W | 326 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.