Daily Sunspot Evaluation
Observation Sheet Sunday, 31 July 1988
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)
- 6
- Number of spots (f)
- 114
- Relative number (R)
- 174
- Observer
- HE
- Reading
- counts consistent, some coordinates doubtful
- File
- 19880731.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HK – 1 | 11 | 76W | 12 ⚠ | 35W | 2.5 | 153 |
| 2 | DAC – 29 | 14 | 20W | 256 | 23W | 8 | 158 |
| 3 | BXO – 5 | 25 | 9E | 227 | 6E | 4.75 | 162 |
| 4 | FKC – 47 | 29 | 32E | 204 | 28E | 17 | 159 |
| 5 | BXO – 2 | -24 | 50E | 286 ⚠ | 47E | 3.5 | 164 |
| 6 | DK – 30 | -21 | 23W | 259 | 26W | 7.5 | 156 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.