Daily Sunspot Evaluation
Observation Sheet Thursday, 13 August 1992
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)
- 4
- Number of spots (f)
- 29
- Relative number (R)
- 69
- Observer
- MB
- Reading
- all checks consistent
- File
- 19920813.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | EKC – 10 | 16 | 64E | 256 | 61E | 13.5 | 292 |
| 2 | EKC – 8 | -12 | 67W | 27 | 70W | 19.5 | 294 |
| 3 | HA – 4 | -16 | 10E | 310 | 07E | 03 | 295 |
| 4 | HR – 7 | -23 | 14E | 306 | 11E | 3.5 | 303 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.