Daily Sunspot Evaluation
Observation Sheet Thursday, 1 August 1991
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)
- 8
- Number of spots (f)
- 94
- Relative number (R)
- 174
- Observer
- TA
- Reading
- all checks consistent
- File
- 19910801.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 2 | 9 | 83W | 353 | 86W | 4 | 388 |
| 2 | HA – 1 | 2 | 68W | 338 | 71W | 2 | 394 |
| 3 | HA – 5 | 11 | 67W | 337 | 70W | 5 | 393 |
| 4 | BXO – 4 | 13 | 02W | 272 | 05W | 5 | 415 |
| 5 | EKI – 48 | 22 | 25E | 245 | 22E | 11.5 | 413 |
| 6 | HA – 1 | 32 | 54E | 216 | 51E | 1.5 | 416 |
| 7 | HK – 18 | -18 | 06W | 276 | 09W | 7 | 407 |
| 8 | DAO – 15 | -13 | 29E | 241 | 26E | 9.5 | 414 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.